Top 1% control more than 30% of San Francisco's wealth.http://money.cnn.com/2016/05/25/news/economy/middle-class-silicon-valley/index.html?iid=hp-stack-dom--------------------------------------------------------------------------------------While it takes $80K to afford a median prices house in Boston, it takes a whopping $145K for the same in San Francisco. http://money.cnn.com/infographic/real_estate/what-you-need-to-earn-to-afford-a-home/?iid=hp-stack-dom