Earlier quoted context omitted.
uh, money?
Currency is the intermediate trade good. Currency is only worth what you can buy with it. If nobody makes anything, no amount of money can buy anything. If the only people making things are the rich folks who own production capital, they can only trade with each other. If they are not producing the things that rich people want, they can't trade. Imagine a degenerate world where there are two rich factory owners and 7…
Which will be solved by the third richie who has a military drone production and maintenance facility.