Anything short of “quintuple the housing stock of cities and pop the real estate bubble’ isn’t serious.

This isn’t really serious either, that’s a massive investment that wouldn’t address the root problem of houses being a financial asset. If you want to pop the bubble, outlaw landlords, mortgages, and owning a house that stays empty for more than six months. Then prices will necessarily crash until people can actually afford them. (And yes, also build more, and build public housing for the people that still leaves behind.)