Will all rich people in all countries collectively agree to be moved into tiny apts same size and give up their luxuries?
If not, how do you define who gets what? Who gets to live in the fancy house, etc?
Using the metric of “4 earths of resources” is confusing and easily misunderstood. What that metric means is that if everyone were to have the same consumption as the average U.S. person tomorrow, we wouldn’t have enough renewable resources to meet demand.
This is not an insurmountable problem. It just requires increasing production everywhere else. Your cited metric isn’t a stat on the theoretical limit of global production, it’s one that describes its current limits.
The stat also factors in carbon emissions, but this is also easily addressable in a world where labor and maintenance is cheap.
Land, energy infrastructure, mineral deposits, grid capacity, etc.
Who gets to live in the nice parts of the world? Who has a national park as a neighbour? Who gets to be ravaged by hurricanes every year? Who gets to have more energy production closer to then? Who will own the land that has the finite resources that are used to create abundance? Where will people with the most power live?
There are so many reasons beyond production why certain areas fare better than others inherently, I have not seen any answer to this apart from that all rich people will just fold and we will all be moved into soviet skyscrapers which I find improbable.
Our current oligarch-capitalist system (wherein most of the world is dictatorship or plutocratic) is not capable of equitable resource distribution. However, future, better systems of organization will likely provide better mechanisms for distrubtion.
Capitalism is an old and dying system. It is clearly unfit for the 21st century. It's best thought of as anachronistic, like feudalism. Once it's been excised from our societies, we'll be able to answer your questions.
Meanwhile capitalism bases itself on game-theory and evolutionary selection. You compete with power, sexual selection and resources. It's sadly a system more aligned with the natural order of things. If you strip away all banks, hedge funds, etc, you are again going to get people who want to mate with the hottest fit partner, get the most resources to ensure survival of their offspring, etc.
The organizational/political problem I mention above with the land use land in the same bucket. Who gets the best land, etc. Historically this has just been decided by war and killing each other. Maybe you're right and that's where we end up, but that is very far from the utopias talked about in the comments above.
This is beyond naive.