I don't see it, in the United States, as being that severe. The housing and economic squeeze is going to change the locations that people live and may change the ways in which people live together, but I don't expect it to become a wound so long as the corrective curve is round. I expect new laws which are likely to act as a pressure valve towards this issue.

If something cannot continue forever, then it won't. Population decrease may be inevitable and if so then handling it with less panic is smart.