Great quote Vertigo. I think I should read the book.
However, in the analogy, replace green piece of paper with gold trinkets, beads, cattle, salt, bushel of wheat, better weapons etc - all these are are what people love to accumulate. So in places where there is no notion of currency, people will still like to have more land, cattle, better houses, or house by the sea etc. And if we did not have the drive to better our lives in some way, what would we really live for besides food, shelter and sex? And if so, how would that be different from the chimps?
Capitalism and greenback has many flaws, but one of the proponents of capitalism and free markets was Ayn Rand. Reading mostly two of her books : Fountainhead and Atlas Shrugged (thick and difficult to go thru about 1,000 pages odd) changed much of my view on the subject. Worth a read.