> The USD and the Euro are backed by the fact that the government will only accept payment in those currencies But how much of it? This will stop the value fro

> The USD and the Euro are backed by the fact that the government will only accept payment in those currencies But how much of it? This will stop the value from going to zero, but what's to enforce a specific exchange rate between dollars and other goods? Is it just the fixed price of postage stamps? (I'm actually inclined to agree with you but this is one detail I haven't worked out)