Public pension systems are the consent decrees nobody talks about — binding obligations negotiated in backrooms decades ago that now dictate what a city can and cannot do more than any mayor or council vote. This week, we trace the exact mechanism by which pension math becomes political fait accompli: the assumptions buried inside actuarial reports that let politicians defer catastrophe just long enough to become someone else's problem. When the numbers finally stop lying, entire cities don't go bankrupt — they just quietly stop being cities.