There are so many other things in our society we could have paid for - like maybe healthcare, education, pensions, etc - with the dump truck loads of wasted money we've thrown at the Pentagon.
Special Enterprise Reporter Scot Paltrow unearthed the “high cost of the Pentagon’s bad bookkeeping” in a Reuters investigation. It amounts to $8.5 trillion in taxpayer money doled out by Congress to the Pentagon since 1996 that has never been accounted for. (The year 1996 was the first that the Pentagon should have been audited under a law requiring audits of all government departments. Oh, and by the way, the Pentagon is the only federal agency that has not complied with this law.)