Our weapons superiority is keeping our military strong. We need to insure that it stays that way. We can afford it. Our military budget is actually at a low point as a percentage of GDP. But weapons costs could be reduced with better contracting procedures. I was a defense engineer for forty years. During that time many times I was employed in a make work capacity. Profits of military contractors are closely examined by congress to ensure that they do not make excess profits. The criteria is usually that profit is a maximum percentage of the contract price. There is a stong incentive to increase the contract cost to increase the profit with fixed percentage profit contracts. The govenment goes along with this as it creates more jobs and keeps politicians in power.
Other times we had to work hard to make deadlines. The space race was such a time.