Politically speaking, "left leaning" and "liberal" are both terms of 18th century origin, referring to the same kind of opponents of the centralized monarchic/oligarchic authority in favor of distribution of power to the people at large based on a conception of inherent rights; they certainly aren't opposite terms.
And the modern US liberal/conservative divide is a lot more about the purpose of government intervention than for/against it. (Both liberals and conservatives attack each other over different policies for supporting government control over individual freedom.)
The solution is simple. Set aside a square mile in each city on the peninsula and zone it such that it is illegal to build a building of less than 10 stories. At the same time, and more importantly, repeal both proposition 13 and rent control statutes.
For step 3, sit back and watch the California economy go into turbo drive as there is a massive construction boom, which funnels money away from rich landlords and into the pockets of ordinary construction workers and the service workers that support both them and the engineers the region's wealth is built on.
1 - http://www.nytimes.com/2000/06/07/opinion/reckonings-a-rent-... 2 - https://medium.com/@Scott_Wiener/yes-supply-demand-apply-to-...
There are also many areas zoned for a maximum height of zero feet.
As for how to be involved, start by looking up who your city councilperson is. Talking to them would be a good start.
The smartass in me wants to say, "then build subterranean homes/buildings" :)
Would suck in terms of natural lighting but it would be nice to see the faces of people who want those zones to be like that.
Though there is legislation in the works to limit maximum depth as well as height[2].
1 - http://www.theguardian.com/artanddesign/2012/nov/09/billiona...
2 - http://www.wsj.com/articles/SB100014241278873238935045785595...