I'm going to sound like a broken record here but there are policy and other decisions being made in the Bay Area that are restricting the housing supply and driving up the price of existing housing. You don't have to be a bystander in this process, you can help lobby for more supply.
A list of propositions and legislation to support (SF, Brisbane, Mountain View, the CA state legislature) can be found here: https://news.ycombinator.com/item?id=14195301