Originally Posted by
VPescado
Umm...that's not how it works. The Mint is essentially charged $1 when they monetize the coin. Their cost of 18 cents (or whatever) is covered by their budget.
You might also want to look into how the money supply in the US is controlled to understand why the Treasury can't (using your same argument) just print $100 bills for a huge "profit".
You are going to want to google the word seignorage. Coins function differently than bills.