I think with the existing situation in SF where you have a lot of young people with high wages who will live in a run-down place in the mission and pay $2-5k, if you build a bunch of luxury condos and need people to fill them, those people will move out of the mission and into a luxury condo. As buying pressure for lower quality housing e.g. off Mission St. is released into the luxury market, prices come down and schoolteachers can once again afford the Mission, or Lower Haight, or wherever.
One valid point I see coming from the anti-development camp is that the new surge in tech jobs is caused by a credit bubble, and once that crashes, you'd have all this excess supply, and it will tank the SF housing market, making the NIMBYs worse off than if expansion happened gradually.
I guess it comes down to whether you "believe in" the sustainability of bay area tech.
It's disguising of this NIMBYism as looking out for low-income renters that is ridiculous.
Are you implying that there's some sort of grand-scale collusion on rent prices? If most rent takers think "hey, the median salary is X so I'll just charge X * 0.33" then what's stopping another rent taker from drastically undercutting that price?
I have no reason to believe that either home prices or rent are set by wages.
Only to a certain extent. Loaned capital is still limited by wages (no one is going to give a $1 million mortgage to someone who makes $40k per year). But again, I don't think wages has hardly anything to do with house prices; it's all about supply and demand. Sure, most people might only be willing to pay 1/3 their salary on housing. That doesn't mean that the price for housing is that number. If a huge supply of housing for less than that price floods the market, then why would everyone continue to pay 1/3 their salary for housing when they could pay 1/4 or 1/6?
Supply and demand also works for buying. Because central banks have ran with ultra-loose monetary policy since forever credit supply is huge and prices detach from wages.
What a total mess these guys have created. Easy on the way down, chaos on the way back up.