SUBJECT: The Rule on ‘The Prohibition’ against Diminution of Salaries of Commissioners

I. Introduction

This memorandum exhaustively examines the constitutional rule prohibiting the diminution of salaries for certain constitutional commissioners during their tenure. The analysis centers on Article IX (A), Section 3 of the 1987 Constitution , which states: “The salary of the Chairman and the Commissioners shall be fixed by law and shall not be decreased during their tenure.” This provision applies to the Civil Service Commission (CSC), the Commission on Elections (COMELEC), and the Commission on Audit (COA). The prohibition is a cornerstone of the fiscal autonomy and independence of these constitutional bodies, designed to shield them from potential political or economic pressure from the legislative and executive branches. This memo will delineate the scope, rationale, jurisprudential interpretations, exceptions, and comparative aspects of this rule.

II. Constitutional Text and Scope

The explicit constitutional text is found in the Common Provisions for the Constitutional Commissions under Article IX (A), Section 3. The rule is unambiguous: the salaries of the Chairman and Members (Commissioners) of the CSC, COMELEC, and COA are to be “fixed by law” but, once fixed, “shall not be decreased during their tenure.” The term “tenure” refers to the period for which the official is appointed, which is generally seven years without reappointment as specified in Article IX (A), Section 1(2). The prohibition applies only to decreases or diminution; it does not prohibit increases, nor does it guarantee that salaries will be increased. The protection attaches from the moment the official assumes office and continues until the expiration of their term, resignation, removal, or death.

III. Rationale and Purpose

The primary rationale is to safeguard the independence of the Constitutional Commissions. By insulating commissioners from financial retaliation or inducement, the framers of the Constitution sought to ensure that these bodies can perform their vital functions—overseeing the civil service, administering elections, and auditing public funds—without fear or favor. The rule prevents Congress from using its power of the purse to influence or punish commissioners for decisions displeasing to the legislature or the executive. It is a specific manifestation of the broader principle of separation of powers and checks and balances, ensuring these independent bodies remain free from coercive fiscal control. As held in De Leon v. Esguerra, the independence of these commissions is protected by several constitutional guarantees, including security of tenure and this prohibition on salary diminution.

IV. Key Jurisprudential Interpretations

The Supreme Court has consistently upheld the absolute nature of this prohibition. In Nitafan v. Commissioner on Internal Revenue, the Court ruled that the prohibition against diminution of salary “includes other emoluments and allowances” that are part of the compensation package. The attempt to subject the salaries of judges (who enjoy a similar prohibition under Article VIII, Section 10) to income tax was deemed an unconstitutional diminution. While Nitafan specifically concerned members of the judiciary, its doctrinal principles are squarely applicable to constitutional commissioners due to the parallel constitutional intent to ensure independence. The Court stated that the prohibition is not merely against a decrease in the nominal amount but against any action that effectively reduces the real value or purchasing power of the compensation. However, in Bengzon v. Drilon, the Court clarified that not all allowances are covered; the prohibition extends only to compensation “to which the officials are entitled by reason of their office,” not to discretionary or per diem allowances for specific, non-regular duties.

V. What Constitutes “Diminution”

Diminution is not limited to a direct legislative act reducing the numerical figure of the base salary. It encompasses any action that results in a net decrease in the total compensation or economic value received by the commissioner. This includes, as per jurisprudence:

The imposition of new taxes or levies specifically targeting the salaries of commissioners.

The withdrawal or reduction of allowances that have been traditionally received and are considered part of the compensation package.

Any economic measure that discriminatorily affects the real income of commissioners compared to their status upon assumption of office.

The critical test is whether the official receives less net compensation after the measure than before it. The prohibition is personal and attaches to the individual officeholder for the duration of their specific term.

VI. Exceptions and Limitations

The prohibition is not without limits. The following are not considered unconstitutional diminution:

General and Non-Discriminatory Measures: A general tax law applicable to all income earners, including commissioners, does not constitute a diminution. The law must not single out constitutional commissioners.

Withdrawal of Discretionary Allowances: Allowances granted for incidental or specific functions (e.g., per diem for attending specific meetings not inherent to the office) can be withdrawn without violating the rule, as they are not part of the fixed “salary.”

Valid Elimination of the Office Itself (for future appointees): Congress cannot reduce the salary of a sitting commissioner, but it may, by law, reorganize or abolish the commission itself for a legitimate purpose. However, this cannot be done as a subterfuge to remove incumbents, and any such law would not affect the salary protection of current tenure holders during their term.

Consequences of Valid Removal: If a commissioner is removed from office for cause through impeachment (for the COMELEC Chairman) or other constitutional means, the salary protection ceases upon valid removal.

VII. Comparative Analysis with Other Officials

The Philippine Constitution provides similar but not identical salary protection to other high-ranking officials to ensure their independence. The comparative table below outlines these provisions:

Official / Branch	Constitutional Provision	Key Text	Scope & Nuance
Constitutional Commissioners (CSC, COMELEC, COA)	Article IX (A), Section 3	“…shall not be decreased during their tenure.”	Applies to Chairman and Commissioners. Includes salary and integral allowances. Tied to 7-year tenure.
Members of the Judiciary	Article VIII, Section 10	“…shall not be decreased during their continuance in office.”	Applies to all judges and justices. Strongly protected to preserve judicial independence. Subject of the Nitafan ruling.
President & Vice-President	Article VII, Section 6	“…shall be determined by law and shall not be decreased during their tenure.”	Applies during their elected 6-year term. Increase, if any, only takes effect after the term of the approving Congress.
Members of Congress	Article VI, Section 10	“…shall be determined by law. No increase in said compensation shall take effect until after the expiration of the full term of all the Members of the Senate and the House of Representatives approving such increase.”	No explicit prohibition against decrease. The rule is primarily a restraint on self-serving salary increases. A decrease may be politically difficult but is not constitutionally barred.
Ombudsman & Deputies	Article XI, Section 10	“…shall be fixed by law and shall not be decreased during their term.”	Identical in principle to the protection for commissioners, underscoring the Ombudsman‘s independence.

VIII. Procedure for Fixing and Adjusting Salaries

The initial fixing and any adjustments to the salaries of commissioners are governed by law, primarily the Salary Standardization Law (SSL) enacted by Congress. The President proposes a salary structure, but it requires legislative enactment. The prohibition against diminution operates as a constraint on this legislative power concerning incumbent officials. For any new SSL or amendatory law to be valid as applied to sitting commissioners, it must not have the effect of reducing their total compensation from its level at the start of their tenure. This often requires a “hold harmless” provision ensuring that incumbents are not adversely affected. The Commission on Audit plays a critical role in ensuring that the disbursement of salaries complies with this constitutional safeguard.

IX. Contemporary Issues and Applications

Modern applications of the rule involve:

Tax Reform Laws: Every comprehensive tax reform (e.g., TRAIN Law) raises the question of its impact on protected officials. The established doctrine is that general, non-discriminatory tax increases are permissible.

Budgetary Reallocations: The executive branch, through the Department of Budget and Management (DBM), cannot unilaterally withhold or reduce the mandated salaries and necessary allowances of the commissions, as this would violate their fiscal autonomy.

Inflationary Erosion: The prohibition is against legal diminution, not economic inflation. The constitutional guarantee does not provide an automatic cost-of-living adjustment. Protection from inflationary decrease, while a policy concern, is not a constitutional right under this clause.

Performance-Linked Pay: Introducing a performance-based component that could result in a lower total payout than the fixed salary may be construed as a diminution and is likely unconstitutional for incumbents.

X. Conclusion and Summary

The prohibition against the diminution of salaries for Constitutional Commissioners is a fundamental, absolute, and personally applicable guarantee during their fixed tenure. Its purpose is to fortify the independence of the CSC, COMELEC, and COA by removing a potent tool of political influence. Jurisprudence has expansively interpreted “diminution” to cover a net reduction in total compensation, including integral allowances, but has allowed general, non-discriminatory tax measures. The rule distinguishes these commissioners from members of Congress, who lack similar protection, and aligns them with the Judiciary, the President, and the Ombudsman in their degree of fiscal insulation. Any legislative or executive action must be meticulously scrutinized to ensure it does not, directly or indirectly, reduce the compensation of an incumbent commissioner from its level at the start of their term. This rule remains a critical pillar in maintaining the integrity and autonomous function of the Philippines’ key constitutional oversight bodies.