Wow! this is some of the stupidest shit I have heard in days. There are more citizens of the USA and UK that own property in Australia than Chinese citizens.
Your “reportedly” statement is made up bullshit and the “ghost cities” were a lie. they are now full of people. Our backwards ass government can’t conceive of infrastructure until a decade after its needed and then they get bent over the barrel with budget blowouts that cost the taxpayers double the original stated costs. Meanwhile China spent a bunch of money during the financial crisis when materials and labor were cheap to build infrastructure and you act like it is a bad thing.
The government. Also if the 10% of homes that were empty on the night of the last census were suddenly dropped onto the market it would cause a massive drop in prices so more people could afford homes.