Completely unnecessary partisan drivel. The man asked a question and you made a useless generalization that shows, more than anything else, that you don't understand your opposition's socioeconomic philosophy.

However, you are correct, currency is simply a tangible representation of value. Wealth is not a zero-sum game. Consider a screwdriver. Physically, this screwdriver is simply its raw materials. However, by organizing the materials in the right way, this screwdriver becomes more than the some of its parts and increases its value accordingly. Thus, by selling this screwdriver for its perceived value, one can create wealth in the difference of costs vs. revenue. Of course, a simplistic example, but one that answers the question fairly well.

Edit: Maybe I should cite pg and get on the bandwagon...