Its a lot easier to make a profit with the Department of Defense covers any cost overruns.
Any company who causes consistent cost overruns in DOD contracting will receive “Red” Contractor Performance Assessment Ratings. This is a scarlet letter in the industry and will eventually kill their contract business. Bad things can sometimes happen, but all contractors have DCMA auditors at their place of business to monitor contract progress. Not many fields have this kind of oversight. Sure money can sometimes be wasted, but the field is one of the few conservatives industries left and is full of patriotic Americans who want our military to continue to be the best. You should worry more about money wasted studying the Climate Change hoax.