I know little of U.S. foreign policy, but here's my unoriginal take. Those conflicts the U.S. engage in are the test beds for its military industry. Wheels need to spin and shrinking the industry is not an option. What's at stake is deterrence, thus yes survival, and I think it works quite well for them. In regards to "fraud".. you mean corruption.. or defunct machinery?.. in the former case I'd say it's a bonus for standing by.

Thanks for standing by.. :)