Money, after all, is an abstract artifact, like language - merely symbolized by the paper or coin or whatever. If you can fully grasp its abstractedness, especially in the computer age, it becomes quite clear that no group can monopolize this abstraction, except through a series of swindle. If the usurers had been bolder, they might have monopolized language as well as currency, and people would be saying we can't write more books because we don't have enough words, the way they now say we can't build starships, because we don't have enough money.