> So don't increase demand by allowing wealthy foreigners to buy out everything.

I’m not sure about the effect of “wealthy foreigners” since if they are wealthy they are probably competing for more expensive properties that your school teacher or grocery store worker aren’t.

But you’re on to something here which isn’t being addressed which is the effect of mass migration to some of these countries. Obviously the migrant workers too want to and gravitate toward the cities with the most jobs, which would place additional pressure on housing prices since they join an already hyper competitive pool of buyers.