The american dollar is loosing value by the minute, and trying to protect the ones in circulation against being further devalued isnt important? What is? They have the time to investigate and arrest illegally downloaded songs dont they? Which is worse defacing the US dollar or stealing a penny from snoop-poodle?
I know that my knowledge of economics is rusty, but I think you're conflating the concept of the value (as in economic worth) of the dollar with its prestige.
If they destroy currency, one would think that there would be less of a supply, and therefore it would increase the value of the dollar rather than decrease it!