I often think that for a government to convince me that they are serious about addressing a housing crisis, the first thing they need to do is determine what proportion of residential properties are not being used as a primary residence. It seems to me (looking at changes in the number of households to number of dwellings in my property obsessed country) that that proportion has been declining and policies should be introduced to encourage people not to remove residences from the permanent housing stock (e.g. higher taxes on short term rentals, second homes, empty homes, etc).