> That's not enough of an incentive.

One relatively simple solution is to pass laws that mandate building homes along stores and hotels. Want to build a large hotel and some stores? Need to also build 4,400 affordable houses. And, since we are fixing the world, add to that mandatory investment in clean energy for seawater desalination, because water and energy for those homes will have to come from somewhere.

And I didn't even suggest higher density habitations.