The neoliberal approach here would be just to tax people and if government wants to have affordable housing units they should just buy them like anybody else. Not create this ridiculous approach where we put a drag on home-building during a home-building-shortage.
It's insane - IZ basically lets the landlords and comfortably landed gentry ignore the housing crisis while their home values climb, and meanwhile expects the builders to provide affordable housing gratis while they're also providing market housing for people who aren't poor-enough to qualify for something subsidized. It's completely backwards.