Earlier quoted context omitted.
Expansion of the money supply is not "counterfeit" money, although there are circumstances where it is a bad idea. Counterfeiting is when a private citizen decides to, as it were, expand the money supply with his or her own printing press.
Why should we treat the action of the government differently from the same actions of citizens? Wouldn't it be wrong for a government to murder people with no provocation? Wouldn't it be wrong for a government to kidnap people and hold them captive in a secret location? Why then is it fine for the government to debase the currency, and therefore destroy the value of any accounts held in that currency? This is the cur…
As you put it, the government has the ability to debase a currency (I'm not arguing it's fine to do so, but I agree that it has the ability). Would you prefer to give this ability to private entities (corporations and individuals) as well? That is what commodity-based money gives you. Whoever produces or purchases that commodity has an effect on the money supply.
As an alternative way to think about it, would you want a money supply based on oil? It is also non-renewable, malleable (yay liquids), portable, and hard to counterfeit. How about money based on copper?
I'm sure the folks in the middle east and Chile (respectively) would love to be able to affect our money supply. Also, the cost of driving a car or building a house would go up needlessly, just like the cost of gold for electronics and medical uses is needlessly high because of gold's status as a speculative commodity.
So yeah, if there was a way to have a perfect money supply not subject to manipulation, I'd be all for it... but a commodity-backed system is just as bad (or worse) than a fiat one.