Because they paid rent (responsible), and now their taxes are going to pay landlords for other's rent. It's basically saying there is an incentive to stop paying rent if the government will just pick up the tab.
Note: I'm not saying I agree with the mindset above, but this is a how a good chunk of people think.
Note: I'm not saying I agree with the mindset above, but this is a how a good chunk of people think.