In many cases impoverishing various governments, corrupt or otherwise, would be worse than useless. Many, many people rely on government for food, fuel and shelter.

Secondly there are many of us who consider a currency that can be centrally adjusted as part of economic stabilisation to be a very good thing.

Third, in an expanding economy, a deflating currency steals wealth from the productive and hands it to hoarders.

So yeah, it's pretty useless as far as I can tell.