Yes and no. There are a lot of owner-occupiers in Australia now who on paper are Millionaires, and they like being Millionaires. They are not going to like it if/when that status is stripped from them.
If houses nationally suddenly dropped in value by 50%, even if people's mortgages were halved at the same time, I expect the change would still be met with hostility. It's the unspoken truth of housing affordability: far too many Australians are happy with the present housing prices. They're outnumbered by the rest of us, but they are a large enough voting block to decide any election.