I have long had a vision for building a new city-state in a relatively unpopulated part of the world and just allowing millions of immigrants to move there (the tough part would obviously be getting the government that owns that territory to go along with it).
Hopefully in 15-20 years, when energy (from solar?) is abundant and cheap, making stuff like water desalination and vertical farming cheap, a place like Western Australia would be inhabitable. That way, you could open the floodgates for ten or hundreds of millions of immigrants to escape oppressive and corrupt regimes and start anew within a liberal democracy. All that cheap labor would make it easy to build out extensive subway lines and high rises.
The biggest problem is making the place sustainable AFTER it's constructed and preventing the sheer emptiness that's plagued China's planned and constructed cities.
Hopefully in 15-20 years, when energy (from solar?) is abundant and cheap, making stuff like water desalination and vertical farming cheap, a place like Western Australia would be inhabitable. That way, you could open the floodgates for ten or hundreds of millions of immigrants to escape oppressive and corrupt regimes and start anew within a liberal democracy. All that cheap labor would make it easy to build out extensive subway lines and high rises.