The silent architect finds his voice.

Picture this for a minute.

The year is 2007. Cash is still king for most Kenyans. Salaries can arrive through a bank, cheques move between businesses and cards exist, but sending money to a relative often means a bus parcel, a bank branch, the Post Office, a remittance company or a trusted traveller.

Safaricom and Vodafone have another proposition. A phone number can become an address for money. A kiosk that sells airtime can become the place where cash enters and leaves a digital system. A worker in Nairobi can send something home without losing an afternoon in a queue.

The idea does not fit neatly inside the law then governing banks and payments. That is usually where bureaucracy reaches for the safest word it knows.

No.

Kenya’s regulators found another answer.

M-PESA began as a small pilot in 2005 involving Vodafone, Safaricom, Faulu Kenya, Commercial Bank of Africa and fewer than 500 customers. Safaricom approached the Central Bank of Kenya as commercial launch drew closer. The bank asked for more information, examined the legal position and the proposed safeguards, then issued a letter of no objection in February 2007. The regulatory chronology places that letter before Professor Njuguna Ndung’u became governor in March. Safaricom launched M-PESA on 6 March 2007.

Ndung’u did not invent M-PESA and did not single-handedly authorize its birth. The product came from engineers, executives, development partners, regulators, agents and customers. The decisive first permission was the work of an institution and was issued at the end of Andrew Mullei’s tenure as governor.

Ndung’u inherited the harder question. What should a central bank do when an experiment begins growing faster than the rules written for it?

He kept the door open.

Banks challenged the arrangement. Policymakers worried that a telecommunications company was performing functions that looked increasingly financial. M-PESA held customer funds in trust accounts, submitted information to the Central Bank and operated under continuing scrutiny while Kenya developed a fuller payments framework. The regulator watched the risks without forcing the service into a banking licence designed for a different business.

The World Bank credits the Central Bank’s Payments System Group, Safaricom, Vodafone, government ministries, development partners and the first FinAccess survey. Ndung’u’s contribution came through preserving that institutional approach during M-PESA’s rapid expansion and defending regulation that learnt from the market it supervised.

His defence of that regulatory space placed him among the silent architects of Kenya’s financial inclusion story. He did not lay every brick. He protected enough space for other people to build.

From Kandara to the Central Bank.

Njuguna Ndung’u was born in Kandara, Murang’a County, in 1960. He studied economics at the University of Nairobi, earning bachelor’s and master’s degrees, before completing a doctorate in economics at the University of Gothenburg in Sweden.

His career began in the classroom. He joined the University of Nairobi faculty in 1987 and taught advanced economic theory and econometrics. He later worked at the International Development Research Centre and the Kenya Institute for Public Policy Research and Analysis, where he led macroeconomic and modelling work. From 2003 to 2007, he directed training at the African Economic Research Consortium.

President Mwai Kibaki appointed him the eighth governor of the Central Bank in March 2007. Ndung’u served two four-year terms, remaining in office through the first years of Uhuru Kenyatta’s presidency and leaving in March 2015. He returned to the African Economic Research Consortium as executive director in 2018. AERC’s account of his appointment traces a career spanning research, training, regulation and public policy.

In October 2022, President William Ruto appointed him Cabinet Secretary for the National Treasury and Economic Planning. Few Kenyan technocrats have occupied senior positions under three successive administrations. Fewer still have moved from explaining policy in a seminar room to regulating money and then carrying the national budget into Parliament.

Ndung’u’s public life has remained more visible than his private one. Claims about his wealth and family circulate online without dependable documentary support. They do not explain the decisions for which citizens can properly hold him accountable.

His ideas do.

The professor’s treasure map.

Search through Ndung’u’s work at Brookings, AERC and other policy institutions, and the same convictions recur.

Innovation needs regulators who understand a product before deciding how to contain it. In a 2017 essay on transformational technology, he argued that African regulators should identify risks without closing the route through which useful products reach the market. The M-PESA experience gave that argument a working example.

Digitization also needs more than a celebrated application. It needs connectivity, payment infrastructure, identification systems, and regulators capable of supervising technology. His 2018 work on Africa’s digital potential connected digital payments to business models, financial access, and revenue administration. Later work stressed connectivity, interoperability, and electronic identification as the rails on which further inclusion would travel.

Taxation occupied another part of the map. Ndung’u warned in a 2019 policy brief that governments could reverse financial-inclusion gains by treating mobile transactions as an easy source of revenue. Higher charges can reduce use, encourage cash, and shrink the activity being taxed. A digital trail makes a transaction visible to the tax authority. Visibility does not make the user infinitely able to pay.

The papers were not detached academic curiosities. They described a governing method. Build capable institutions. Give them room to learn. Make rules that protect the public without suffocating useful experimentation. Do not use a successful platform as a captive tax base.

Then the professor entered the Treasury.

The institution he joined.

Ndung’u took office in October 2022, with Kenya facing expensive debt, drought, a weak shilling, and a population already squeezed by the cost of food and fuel. The government needed revenue and could not borrow without consequence. It also arrived with a large political program to fund.

The Treasury he led became the public face of that collision.

The Finance Act 2023 expanded taxes and introduced the housing levy before the courts forced Parliament to redesign it through separate legislation. A year later, the Finance Bill 2024 proposed an annual motor-vehicle tax, tax changes affecting bread and other household goods, and higher excise duties on several financial and communications services. Some of the most unpopular proposals were later removed, but public anger had already outgrown the legislative process.

On 13 June 2024, Ndung’u presented a Sh3.99 trillion budget to the National Assembly and defended stronger domestic revenue mobilization. The budget statement bore the authority of his office.

Days later, protests against the Finance Bill spread across the country. Parliament passed the Bill on 25 June. President Ruto declined to assent to it after protesters breached Parliament. The Kenya National Commission on Human Rights later recorded 39 deaths in connection with the protests by 1 July.

President Ruto dismissed almost the entire Cabinet in July. Ndung’u left the Treasury the following month when John Mbadi took over.

At the handover, Ndung’u criticized the belief that high tax rates automatically produce high revenue. He argued that higher rates can weaken compliance and the activity on which revenue depends. It was the position his published work had already set out years earlier.

It also raised a question that has followed him out of office. If the policy was economically unsound, how much resistance did the Cabinet Secretary offer while his ministry designed, published, and defended it?

A Treasury secretary does not control the President, Cabinet, Parliament, lenders, or every proposal generated within government. He nevertheless carries constitutional and professional responsibility for the fiscal program presented under his name. Internal objections can explain a policy record. They do not erase it.

Ndung’u has now described the pressure more directly.

The day the silent architect spoke.

On 19 February 2026, Sweden’s Ministry for Foreign Affairs and the Expert Group for Aid Studies convened a conference in Stockholm on evidence and development assistance. Ndung’u appeared as a University of Nairobi professor, former Central Bank governor, and former finance minister. His assigned subject was what aid can and cannot do.

He spoke about institutions.

Swedish support had helped finance his doctoral training. Development partners had supported the African Economic Research Consortium, Financial Sector Deepening and early work around M-PESA.

Ndung’u argued that aid produces lasting results when it develops people who can build capable institutions, strengthens oversight, and supports rules that create incentives for development. The organizers' report records his argument and the examples behind it.

During the discussion, he moved from institutional theory to the government he had recently served. His comments reached Kenyan media in July.

“Right now, the current president overruns all the institutions,” he said, adding that officials then “conform for fear”.

He said, “I refused to do deals.”

Business Daily reported the remarks and said State House had not responded to its questions by publication.

No court or investigative body has adjudicated Ndung’u’s accusation against the President. Ndung’u did not publicly identify the alleged deals, the people who proposed them, the decisions affected or the safeguards he used to stop them. Those details determine whether misconduct can be investigated and whether the institution can prevent a recurrence.

President Ruto and his supporters have presented his close supervision as energy and command. At a 2023 performance-contracting event, the president criticized ministers and principal secretaries who knew less about their departments than he did. He said his appointees were expected to advise him from a position of command over their briefs.

The constitutional problem begins when presidential attention displaces lawful authority, professional advice, or the independence of an office.

Ndung’u says that line was crossed.

His account carries unusual weight because he was inside the room. It also carries an obligation. “Deals” is too important a word to leave as an anecdote at a conference. If a proposal was unlawful, the public deserves the relevant records, and the appropriate investigative body should receive them. If lawful decisions were distorted by informal pressure, Kenyans deserve to know how that pressure moved through the Treasury and into policy.

Courage after office is not the same as dissent exercised while in office. Public servants can face genuine personal and professional risks when they resist power. Senior officials also possess access, authority, and protections unavailable to an ordinary civil servant. Silence can preserve a career while transferring the cost of a bad decision to the public.

Ndung’u’s speech should therefore open an account, not close one.

The architecture after access.

Kenya’s formal financial access rose from 26.7 percent of adults in 2006 to 84.8 percent in 2024, according to the latest FinAccess household survey. Mobile money drove much of that expansion. Nearly one in ten adults remained excluded, and the next problem is larger than opening an account.

Access does not guarantee financial health. A person can receive money instantly and still be unable to save. A trader can accept digital payments and remain trapped in expensive short-term credit. A household can appear inside the formal system while one medical bill destroys its finances.

FSD Kenya’s 2026 assessment found weakening financial health, debt distress and continuing gaps in consumer protection beneath the access figures.

The regulator’s task has changed with the market. Kenya now needs affordable interoperability, portable financial histories, transparent digital-credit pricing, effective complaints systems and competition that reaches the merchant’s till. It needs taxation that does not punish the digital trail policymakers spent two decades encouraging citizens to adopt. It needs privacy protections strong enough to stop financial data from becoming an instrument of political or commercial coercion.

None of those protections survives through the wisdom of one individual. They depend on institutions able to say yes to a useful experiment, no to an improper instruction and explain both decisions in public.

In 2007, a new technology arrived before the law knew what to call it. Officials examined it, imposed safeguards, and allowed it to proceed. The institution was strong enough to learn.

In 2026, a former minister says public institutions possess expertise but are overrun by presidential power. Officials conform because they are afraid. The institution remains present on paper and absent at the point of decision.

As governor, Ndung’u’s influence could be seen in a system used by millions, even when his name was not on the screen. During his Treasury years, silence carried a different cost if power was overriding institutions under his watch.

Professor Ndung’u has found his voice. He has used it to make one of the most serious claims a former Treasury Cabinet Secretary can make about a sitting president.

Kenya needs him to finish the sentence.