I would say that a simple palliative would be (possibly dramatically) increasing the taxes on single family homes that are not owner occupied. We have enough homes to end the housing crisis, it's just too cheap for businesses to horde them and profit off of the misery they are (hopefully unintentionally) creating.

There are a lot of things that 1 person can do that are essentially harmless but when a hundred million people do at the same time can cause huge social and ecological damage.