#1 is the symptom, #2 is the problem.

High levels of home ownership combined with "local control" and "democracy" enables the "haves" who already own homes to weaponize government to keep supply low and home values high. Zoning restrictions, building codes, taxes, and other government tools are brought to bear to support this. The "have nots" don't have a chance.

Austin seems to be a counter-example when they "instituted an array of policy reforms" in 2015 that showed great results. Sadly the key may be appealing to the greed of existing homeowners. Changing zoning to allow tall apartment buildings where single family dwellings once stood lets existing home owners make even more money by selling than they'd make by continuing to restrict supply. While it's sad if that's the only path to success, we'll have to take small successes where we can find them.