It's their money to begin with and since they never got it. The us as the bankers(legal thievery) at the time. didn't delivery it back to the customers.
Following the March 2003 invasion of Iraq, the United States liberated, or seized, billions of dollars of assets from that country. But since Iraq had no banking system, the money - much of which came from Iraqi oil sales - was placed in an account at the Federal Reserve Bank of New York.
From there, large pallets of shrink-wrapped cash were periodically loaded into tractor-trailer trucks, driven to Andrews Air Force Base in Maryland, and airlifted to Baghdad. Some $12 billion of cash was flown to Iraq in the months following the overthrow of Saddam Hussein.
But not all of that money is presently accounted for. Roughly half of it - $6.6 billion - has disappeared.