And that's how you keep the market up for $2.4 million homes that would go for $300k elsewhere http://www.mercurynews.com/2017/09/12/now-this-is-ridiculous...
I mean, you increase housing but don't increase retail units or parks in the same area, thereby creating a cultural/food desert. Even if you do, if you don't increase road capacity or install better public transit (which since it's usually at county level requires a lot of coordination), then you're simply increasing problems.
NIMBY is the simplest solution - often folks who end up in that camp have tried advocating other solutions and have failed at them because no-one wants to foot the bill for all the planning bits that make a decent (or even livable) neighborhood.
Just one example: http://www.businessinsider.com/facebook-housing-menlo-park-2...
https://en.m.wikipedia.org/wiki/Company_town
They tend to become exploitative though.