This joke doesn't any fucking sense. Giving people money just once doesn't make them any less poor than they were before. If we're talking normal economics in that era, even just a few silver coins, or at least closer currencies that were minted in that era weren't used very commonly outside of the capitals aside from bartering. Even if you apply this to right now, that's not how it fucking works. If this is the shit matt groening believes, he should just go to detroit and start giving away his billions to see if it changes the problem.
What the fuck kind of crack is matt groening on. Chuck jones said himself that if it doesn't make any sense then how are we supposed to know if it's supposed to be funny? This is young sheldon levels of writing and logic asspulling.