I can't find it now or remember who it was, but an English journalist tweeted something along the lines that there wouldn't be political pressure to build more housing until property owners of a certain age recognized that while their high housing prices were wonderful, that their kids were still living in them was not.
The issues aren't quite the same in this country, but it's the same basic framework. What's it going to take for more people to realize that despite their hippity hop and their iPhones, The Kids Today are entering into a world with a much shittier deal than previous generations got. Education costs, stagnant wages, and no benefits are more the issues here than housing costs (except for a couple of cities). Why don't people notice?