I think it is a legitimate question how much of an offensive information warfare standing capability a country needs when not at war, and what level of dirty tricks intelligence agencies should pull in peacetime to monitor adversaries. Particularly due to the non financial costs of this monitoring -- losing our moral standing as a free and fair country, incidentally monitoring citizens or those present in the USA, in violation of the constitution (especially due to the tortured "five eyes" sharing agreements, which, if they weren't governments, would be viewed as a conspiracy and some kind of constructive crime), etc. I judge all of this stuff by "does it make us safer", and at some point, it clearly goes the other way. I think that point is several hundred billion dollars a year less spending than what we have now (well in excess of a trillion). Maybe 50-75% less spending.