How is that bad for the single Google et al. employee? That still leaves 10k+ a month for everything not housing-related, which is plenty. Outside of housing, SF isn't that expensive (groceries, for example, aren't ~7 times more expensive than the national median like houses are). I have a friend living in SF, making about that amount of money, with a stay-at-home wife and a kid, and they're quite comfortable despite a 7k+ monthly mortgage. This is bad for people who make <100k a year who may never be able to afford a home in San Francisco, especially as the prices keep rising.