Yea, tbh the only REAL solutions that I can think of are all somewhat authoritarian/socialist. I.e. the government buys up some of the property around sydney, forces developers to build large highrise appartments.The only long term solution is better infrastructure, more land released on the outskirts and more approvals for high density housing near existing infrastructure.
If this policy is bad enough, it could be the last straw for me. I'll change my vote to liberal.
Perhaps even forcing people to move out of the city.
A longer term solution is to create more 'medium' sized cities so people aren't quite as attracted to sydney... I.e. a huge commercial/residential development plan for wollongong or newcastle, probably ruining some of the tourist areas around there, but allowing people to live the city lifestyle without putting extra pressure on Sydney.