What it will take to make Silicon Valley affordable again

A particularly interesting question in light of this: https://news.ycombinator.com/item?id=11808651 recent discussion about the merits of Phoenix as a startup hub.

Seattle is in many ways doing better than SF: http://www.vox.com/2015/12/23/10657690/seattle-housing-crisi... but it's not doing nearly enough: http://www.heraldnet.com/news/seattle-rents-increasing-faste...