Oh, so we let Capitalism destroy the planet and the ability to easily grow crops ...and then resort to running around in the heat doing cannibalism?.... do we know they were billionaires at this point, or is there just still enough meat on them to make them worth hunting?

That's the problem with post-Capitalist clarity, it leaves you in a really painful situation, and there may be no other destination possible. It nay be the only place Capitalism ends.

That doesn't even address whether there's a market in human meat and wealthy traders... And how Capitalist that market started. Oh Capitalism may not have ended yet in this scenario....