In pension fund governance, few phrases carry as much weight or pass with as little resistance as “in the best interest of members.” It is the standard against which decisions are justified, strategies are defended, and outcomes are explained.

Yet precisely because of its authority, it has become a phrase rarely examined. Increasingly, it risks being used not only as a guiding principle, but as a convenient conclusion invoked at the end of a decision, rather than tested throughout its making.

The obligation itself is not in question. The requirement to act in the interests of members is deeply rooted in fiduciary law, a doctrine that developed over centuries within English common law. At its core, fiduciary duty requires those entrusted with managing the affairs of others to act with loyalty, good faith, and an appropriate degree of care, skill, and diligence. Pension funds, by their nature, embody this relationship. Those who oversee them do so not for themselves, but for the benefit of members and beneficiaries whose financial security depends on the decisions made.

Over time, courts, regulators, and governance frameworks have interpreted this fiduciary obligation as requiring decision-makers to act in what has come to be understood as the “best interest of members.”

Importantly, however, this phrase is not always explicitly defined in legislation. Rather, it is derived from a broader legal standard. Even within the Pension Funds Act, the emphasis is placed on the proper administration of funds, adherence to rules, and the protection and distribution of benefits, without prescribing a singular, fixed definition of what constitutes the “best interest” in every context. Similarly, the Financial Institutions and Markets Act, 2021, particularly in Chapter 5 dealing with retirement funds, imposes clear duties on boards to act honestly and with due care, skill, and diligence in managing fund affairs, thereby reinforcing the same underlying obligation, albeit through governance language rather than a defined phrase.

This subtle but significant distinction lies in the duty, which is unquestionably legal and enforceable. However, how it is expressed—often through interpretation—is shaped not only by laws but also by practice, judgment, and evolving governance norms. This interpretive aspect gives it both strength and vulnerability.

When the phrase becomes convenient

The difficulty arises when the phrase “best interest of members” shifts from being a standard that guides decision-making to one that simply concludes it.

Often, it’s introduced at the end to justify decisions already made, not at the start, where it could guide options. This can end the discussion, as it grants an unchallenged legitimacy to the decision.

This is not necessarily the result of bad faith. On the contrary, most decision-makers operate with a genuine intention to serve the members whose interests they are entrusted to protect. However, the structure within which decisions are made allows the phrase to assume a level of authority that can obscure the complexity of those decisions. Every governance determination involves trade-offs, whether between cost and return, risk and security, or short-term outcomes and long-term sustainability. Yet these trade-offs are seldom articulated in a manner that allows members to fully appreciate the basis upon which decisions are made.

Problem of definition and accountability

In this context, the phrase can begin to function as a form of institutional shorthand. It simplifies what are often complex considerations into a single, seemingly definitive conclusion. It also has the effect of diffusing accountability.

Because it is inherently difficult to argue against what is presented as being in the “best interest,” the space for meaningful interrogation becomes limited. The question is no longer whether the decision was optimal among available alternatives, but whether it can be reasonably framed within the broad and flexible contours of the phrase itself.

The real issue, therefore, is not misuse but the absence of a clearly defined and consistently applied standard. What constitutes the “best interest” of members is not self-evident. It is contingent on a range of factors, including the fund’s objectives, its membership profile, prevailing economic conditions, and the time horizon for decision-making.

In the absence of a structured approach to defining and testing this standard, it remains sufficiently elastic to accommodate a wide range of outcomes.

This impacts ordinary members, for whom retirement savings governance is distant and opaque. They don’t participate in decisions or see the considerations involved. They only receive the outcome, often assured it’s in their best interest. Though possibly true, this isn’t usually transparent enough for independent understanding or evaluation.

From phrase to standard

If the principle of acting in the best interest of members is to retain its central place in pension fund governance, it must evolve beyond its current usage as a broadly accepted expression. It must become a standard that can be articulated and demonstrated. This does not require rigid definition in every instance, but it does require a greater degree of clarity as to how decisions are evaluated, what alternatives were considered, and on what basis one course of action was preferred over another. The principle’s strength depends on its rigorous application, not frequency. Relying on it without scrutiny risks turning it into mere rhetoric. Interrogating, defining, and demonstrating its application give it substance. To be a true fiduciary standard, it must be consistently and transparently upheld, not just relied upon.

*Vincent Shimutwikeni is a retirement funds author and pension industry professional