Yglesias advocates more legal immigration:

Adam Ozimek offers up some quantitative research on the scale of the effect citing research from Albert Saiz (PDF) indicating that “[i]mmigration inflows equal to 1% of a city’s population were associated with increases in average or median housing rents and prices of about 1%.”
One way to especially take advantage of this effect and politically frame it as housing stabilization policy would be to create a special new class of visa specifically for people who purchase homes in the United States.

I’m double plus in.  For laughs, imagine the facial reaction of a typical ‘patriotic’ tea partier to the suggestion.