I didn't add the qualifier "passively." You did. I think it's great if people are contributing to the region's wealth via their work, but it doesn't affect my argument. The fact is that the locality of Atherton is full of people whose home values are high because of their homes' proximity of the tech industry (this includes Marc Andreesen), and they're not willing to liberalize their zoning ordinances because, as a housing cartel, town landowners benefit from restricted supply. You were acting like the reason there's high demand for housing in Atherton is that it has low density, but what distinguishes Atherton from a random, low-cost town like Muskeegon, Michigan is its location smack-dab in the center of Silicon Valley. You could replace all the mansions in Atherton with high-density condos and they'd get snapped up by tech workers in a short period of time. You'd end up with way more property taxes paid to the state, way more people housed, way more economic growth for the region, and way less pollution as people lived closer to their place of work. Not to mention, the locality wouldn't be suing the caltrain to prevent electrification, because its residents would actually depend on public transport.