The thing is, interest on loans is tax-deductible for businesses (in the US, but I expect more broadly too), like any other business expense. So people may jus

The thing is, interest on loans is tax-deductible for businesses (in the US, but I expect more broadly too), like any other business expense. So people may just set up shell corporations to buy the house and get the deduction anyway. Of course then the capital gains tax treatment would be rather different.