I agree with you, but only because what you are saying is a tautology. If the government was vaporized, and some powerful corporations took over, there would b

I agree with you, but only because what you are saying is a tautology. If the government was vaporized, and some powerful corporations took over, there would be a new de facto government. The corporations would then have to be overthrown. If a national government decided to let an independent fiat currency be developed by an independent corporation, and all the other corporations, such as banks, agreed to use that fiat currency, that currency would have the same value: you need it to trade for your needs because you get paid in it. It is not clear why trade could not continue in the absence of the federal government, as all the banks would probably be willing to lend to corporations with good credit, and they would probably continue storing their reserves in those banks. In other words, I think you assume too many magical steps.