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Why can't house prices be out of tune with salaries
Those folks should be introduced to some real estate folks I know, they'd get along famously, being as how they still think it's 2007. The amount of housing out there requires that a large market of consumers is available to purchase them. If housing prices rose infinitely ahead of salaries, the market for potential buyers would continue to shrink until supply would outstrip demand. And then we have the wonderful housing bubble like the one that we just went through (or in some places like China, have the potential to go through). Short version: It violates the relationship between supply and demand.