In a powerful speech that he gave at the UN Food Systems Pre-Summit in July 2021, [Jeffrey Sachs] addressed several of the ills of global inequality. In just seven minutes, he made clear how much damage has been done. Sachs reminded his audience that the US has a long track record of installing politicians in power in countries that are important either because the American dominant class needs natural resources or because it nees something else from the Global South - cheap labor without much regulation that protects workers, for example. He then criticized rich countries for not looking at the actual financial needs of the poor, but instead promising very modest amounts in financial support. It almost looked like rich countries were motivated to do this only because they had to tick a box to say that they'd given something. Instead, the world needed a change of attitude, and to give a sum of the right order of magnitude, adequate to meet people's actual needs. But then where would this money come from? Here's what Sachs had to say:
The rich indiviuals are increasingly hoarding everything. If the billionaires want to go to space, they could at least leave their money on Earth to solve the critical Earthbound problems. We not have an estimated 2,775 billionaires with a combined net worth of around $13.1 trillion. I have it on good authority that you don't need more than $1 billion to live comfortably. Even if every billionaire kept $1 billion, that would leave around $10 trillion for ending hunger, poverty, and environmental destruction. We should be taxing the vast and rapidly growing billionaire wealth to help finance a civilize world.
This is, exactly, the limitarian argument (although $1 billion is putting the threshold too high).