House flipping, I would tax the shit out of capital gains made this way.
Discussion
Even better: tax vacant properties nobody lives in. If housing stands unused, it needlessly drives prices up for a commodity that, logically, should be abundant — look at how much land is around us everywhere, yet people say housing is scarce? Something's fishy here. Somebody's extracting surplus value from the housing, and clearly it hurts everyone.
I agree, the two should go hand in hand.