We use contract based coins where 1 coin = 1 USD
Gollum , you've been thirsting for a bitcoin alternative for as long as I've known you. You should probably just go ahead and make your altcoin that's pegged to the USD. And see how many people follow.
I sense a problem in determining how many such coins will be created, and who gets them when they are sprung into existence due to your coin mirroring the FED's counterfeiting activities. eta: I don't think the FED even knows how many USD it has created.