It should come as no surprise that it takes two solid incomes in the Bay Area to buy housing close to work, because that's what the market supports. Families didn't become "better off" when two incomes became the norm -- everything just got more expensive.
I think this is one of the nasty secrets why remote work and public transit hasn't taken off like it should; who would support the crazy real estate prices if people could (more easily) choose where they live?
Sort of, but not really. The market can't provide lower-priced housing because of intensive zoning restrictions: http://www.amazon.com/Rent-Too-Damn-High-Matters-ebook/dp/B0... or http://www.voxeu.org/article/causes-and-consequences-land-us.... This: http://www.citylab.com/housing/2013/10/san-francisco-exodus/... pertains specifically to San Francisco and environs.
I'm not claiming this is the cause of frustration, or even a significant factor. Just a thought I had.