[lern_too_spel]

I know several slumlords who have made a killing off of rent control. It rewards bad actors disproportionately more than bleeding hearts like GP's mother.

Because slumlords are better able to extract profits from rent controlled properties, they are willing to buy them for more than they are worth to bleeding hearts. All rent controlled properties will be managed by slumlords in the long run.

[kemiller]

Yes, this, exactly. And I suspect that this is partially behind its persistence in the face of evidence it doesn't work.