> There is not enough of what everyone wants.

Well, that's right...

> What if everyone wanted iPhones? There may be enough iPhones out there to give one to everyone in, say, New York City.

But that's not. Bad example. iPhone production can increase as much as demand asks for. If we let anybody build one, there'll easily be an iPhone for everybody that wants one.

Yet, there are few islands, beachfront properties, waterfalls... The things not available for everybody fall mainly on the non-renewable natural resources, with some slowly renewable ones at the borderline.

We can't make capitalism go away. At least not until humanity changes completely into something that craves what's available at space (mostly energy), instead of what's available at Earth.