Wealth is not zero sum though. LeBron James being great at basketball doesn't make you any worse at basketball. Jeff Bezos starting a company in his garage selling books online that became one of the biggest in the world worth many billions doesn't make me any poorer. Financial transactions are win-win. That is why there is a mutual thank you when making a purchase. The cafe owner would rather have my 2$ instead of coffee in their pot. I would rather have coffee in my cup instead of 2$. If neither of us thought we would not be better off the transaction would not happen