The ones with greater amounts of x and x only.
Not true. Yes someone with more x will have a greater advantage, but it will always the middle class that sets the default. A mechanic can't just wait for a super rich guy to drop in. How often do you see a super rich guy in the place you live, just walking into a super marked and buying the whole loot?But, if there's no global currency, then the mechanic is going to have to be much more thoughtful in what he could accept as payment that would be of value to him.
Not true at all, someone selling a local service will always have to adjust to the local conditions.Global currencies create classes of social rank, and with it, greed.
Unlike how local currency works today?