Back then it was called Treason

Anyone arriving in Vietnam during the Conflict had to part with all of their American green back dollars. You were issued MPCs or Military Payment certificate. Military funny money. The reason was American greenbacks could easily be used on the world market to purchase weapons for the enemy. To spend any real American money was considered an act of treason. It was standard procedure for the military in times of Conflict. Somehow that is no longer applicable. The US Government sent to Iraq $12 Billion dollars in shrink wrapped bundles of hundred dollar bills amounting to 463 tons of cold hard cash. They loaded it by pallets on four huge C-4 Cargo Jets and sent it off to Iraq. It just disappeared and no one knows anything. What changed?

But the key word here is "disappeared". It was never meant to arrive in the first place. At least that's my opinion.

It just changed hands! From our money, to their money! Who is they? One guess.

When did the logic change? If it was wrong during Korea and Vietnam why isn't it wrong today?