a population whose average income is 6X the national average. Google cleaned up San Jose through purchase of most of the downtown land and hiring of a private security force. They've also driven out most if not all of the poor black people.
Sam's model works in a very specific circumstance. It's easy to be a liberal when you have a rich backer doing all the work for you.
Contrast San Jose with San Francisco. SF has 50 billionaires living there, but it is a shit show.