Housing builders don't want prices to fall. Nor do the investors who fund new construction and buy existing houses. In other words, the general public are not the ones you need to convince.
EDIT: Nor do existing homeowners want to see their house prices fall. So anything that relies upon them voting to change the value of their homes is a non-starter too.
Plus, houses are touted as a major investment vehicle for the average citizen. If they all go underwater due to lowered prices, it'll result in a pretty big economic crisis. So most government agencies won't want to see house prices go down too much either.
EDIT: Nor do existing homeowners want to see their house prices fall. So anything that relies upon them voting to change the value of their homes is a non-starter too.
Plus, houses are touted as a major investment vehicle for the average citizen. If they all go underwater due to lowered prices, it'll result in a pretty big economic crisis. So most government agencies won't want to see house prices go down too much either.