http://www.amazon.com/The-Rent-Damn-High-ebook/dp/B0078XGJXO
After reading his book, I am convinced that overpriced rent is a massively important problem that makes countless aspects of society worse.
I've read that people spend roughly 1/3 of income on housing, 1/3 on food and 1/3 on everything else. The long term trend in the U.S. has been to greatly reduce the % of our income we spend on food (due to agricultural and tech innovation). We need to do the same for housing prices over the next 20 years. A small space to live for one person in NY or SF should simply not cost ~30% of your annual income! The materials are very cheap to build a square box! And there is lots of vertical room in our nicest cities to build square boxes. The issue is solely constrained supply due to building regulations (many at the local level).
For tech leaders in SF, this seems like it should be the next big political fight (after immigration).