Because people who want to live there, who can't afford a house, will try to get the rents to go down, so they can afford to live there. What people want is pr

Because people who want to live there, who can't afford a house, will try to get the rents to go down, so they can afford to live there. What people want is pretty much the only thing that matters when it comes to politics (although there are limitations based in what's possible and what's not).