Reflections on Corruption Cases in the Tax Sector
The Ministry of Finance is today facing a severe test following a series of sting operations (OTT) carried out by the Corruption Eradication Commission (KPK). In January 2026, the KPK uncovered a corruption case involving alleged bribery related to tax audits within the Medium Taxpayers Office (KPP Madya) of North Jakarta.
The matter did not end there. In early February 2026, the KPK also conducted a sting operation targeting the Medium Taxpayers Office (KPP Madya) of Banjarmasin over a tax refund case in which funds rightfully belonging to taxpayers were instead exploited as a vehicle for bribery.
The recurrence of corruption in the taxation sector must be read as a serious warning signal for national fiscal governance. This phenomenon demands reformative action: whether the root of the problem lies in a system design and bureaucratic practice that is not yet fully accountable, in regulatory and oversight gaps that still permit deviation, or in the dominance of behavioural factors whereby actors exploit public authority for personal gain.
This means we must today undertake an honest and comprehensive examination of the source of these problems. Otherwise, the tax reform agenda risks becoming trapped in partial solutions and repeating the same failures.
In the context of the modus operandi of corruption offences, the challenges of law enforcement are now increasingly complex. Corrupt practices are no longer conventional, relying solely on cash transactions; they have diversified through the exploitation of various asset forms.
These assets include, among others, land certificates, gold bars, foreign currencies, crypto assets, and other digital instruments and assets. This development demands a more adaptive approach to law enforcement, particularly in the areas of evidence gathering, asset tracing, and recovery of state losses.
A concrete example is the case in which the KPK designated former Directorate General of Taxation official Rafael Alun as a suspect in money laundering, having disguised corrupt assets through the use of cryptocurrency.
The most recent case to provoke public outrage was the KPK’s sting operation against a number of parties allegedly involved in corruption related to goods importation within the Directorate General of Customs and Excise (DJBC). The KPK revealed that the corrupt practices were not incidental but were carried out on a massive and organised scale (KPK, 5 February 2026).
The Fragility of Civil Service Integrity
The latest developments in alleged corruption within the taxation sector have once again opened space for serious reflection on the quality of state apparatus governance. The KPK revealed that Mulyono, whilst serving as Head of the Medium Taxpayers Office (KPP Madya) of Banjarmasin, South Kalimantan, was recorded as holding positions as commissioner or board member in at least 12 private companies. This fact is not merely a personal anomaly but a strong indication of structural failure in the internal oversight system.
From a normative perspective, such conduct clearly contravenes the State Civil Apparatus Law. This prohibition is reinforced by Law No. 25 of 2009 on Public Services. Article 17 explicitly prohibits public service personnel from government agencies, state-owned enterprises (BUMN), and regional government-owned enterprises (BUMD) from concurrently holding positions as commissioners or board members of business organisations.
This means that in this case, the violations are not merely ethical and administrative but also contravene positive law governing the discipline and professionalism of public service personnel.
However, an interpretation that places blame solely on the individual risks obscuring more fundamental root causes. The fact that a strategically positioned structural official within the Directorate General of Taxation could occupy commissioner positions in a dozen private companies without being detected or stopped early demonstrates the weakness of internal oversight functions, particularly in implementing the merit system and managing conflicts of interest.
The merit system, which should ensure that civil service management is based on qualifications, competence, and integrity, failed to function as a preventive instrument and was only “detected” when law enforcement agencies intervened.
Accordingly, this case in truth extends beyond violations of the Corruption Eradication Law; it also reflects serious breaches of the civil service and public service legal framework, as well as a failure in the design of internal government oversight.
This moment should be seized to conduct a comprehensive evaluation of internal control mechanisms, asset and position reporting, conflict of interest management, and the effectiveness of Government Internal Oversight Apparatus (APIP) — not only within the Ministry of Finance but across all government agencies.
Safeguarding Our Fiscal Health
Looking ahead, the principal challenge of state governance no longer rests solely on policy design but on the state’s capacity to orchestrate bureaucratic reform and law enforcement reform simultaneously, consistently, and sustainably.
Without synergy between the two, the development agenda will continue to face a paradox: policies designed to be progressive but their implementation held hostage by institutional weakness and integrity deficits.
The recurrence of corruption in the taxation sector should be read not merely as individual deviation but as a systemic alarm signalling the urgency of structural reform within the Ministry of Finance. Taxation is fundamentally an instrument for the redistribution of social justice — the people’s money collected from the hard work of citizens and converted into public services, social protection, and national development.
When leakages occur due to the negligence or deliberate actions of irresponsible officials, state losses are transformed into direct losses for the people.
Today’s challenges are indeed multi-layered. On one hand, the state faces global economic uncertainty and national fiscal pressures. On the other — and this is more crucial — the risk of budget leakage originates from within the institution itself. This condition affirms that purely administrative bureaucratic reform is no longer sufficient. What is needed is firm, independent, and prevention-oriented law enforcement reform as the principal buttress of the state’s fiscal credibility.
Thus, law enforcement reform is not merely a normative agenda but a technocratic prerequisite for safeguarding the sustainability of state finances and protecting the people’s money.
Nicholas Martua Siagian is Executive Director of Asah Kebijakan Indonesia.