Thanks to banking deregulation housing has become an investment commodity. In major cities in Australia at the moment half the purchases are for investment rather than owner-occupier. Government incentives like first-home buyer grants (if you can't save for a deposit) have only lifted the prices and helped vendors. Another one is negative-gearing introduced a couple of decades ago allowing tax deduction for investmen…
Why would housing not be an investment commodity if banks were more strongly regulated? What specific regulation do you propose that would prevent housing investments?
Foreign Investment Review Board (who should be in charge of making sure foreign investors only buy new properties)
which is apparently a rule that's not being enforced. Lots of the western world is seeing housing bid upwards by capital flight from China.