You say that as though reduction in cost of housing is a universal desire, but it isn't.
Suppose a couple of years ago you took a $500,000 loan to buy a $700,000 house, which you'll be paying off for the next 10 years. Would you like the market value of your house to decline substantially during that time?
If there's enough of the population bought into property, it won't be politically feasible to allow the value of homes to decline.