We don't even have to go back to the gold standard. Any precious or semi-precious metal or commodity, as long as the dollar can be indexed to the value of it collectively (copper, silver, and other various metals) would be a lot nicer than simply allowing the government to pull stunts like this. Even if it's only a fixed percent of the face value of the currency, at least it could be valued against something tangible.
Granted, it would probably cause commodity prices and everything else to skyrocket.