Speaking in Decades: Why Public Capital Lacks a Temporal Vocabulary

Public goods are long-horizon systems. Infrastructure endures for decades; civic institutions accumulate trust and capability across generations; health, education, research and environmental stewardship unfold over timeframes exceeding any electoral cycle. Their defining feature is not scale but duration. The instruments available to govern them are not. Annual budgets treat capital as flow; public debt as liability; grants as event; contracts as transaction. Each is internally coherent and performs a real governance function. None governs capital continuity across mission time, and together they exhaust the working vocabulary. The consequence is not that the function disappears. A function without a category is performed by substitution — and public--private partnerships are the principal substitute, a contractual approximation of an intertemporal commitment that public finance cannot name directly. On this account PPP persistence is not opportunism or weak governance but a predictable response to an epistemic gap: when continuity cannot be named it cannot be budgeted, audited or defended, so it is pursued through instruments designed for something else. This paper sits between the capital architectures that fail and the accounting systems that reproduce them. Its claim is that reform aimed at either end cannot succeed while the middle is missing: better contracts and better standards both operate inside a vocabulary that has no word for the thing being governed.