If one overall concept drives national security decisions in Washington, it is that technology in the form of highly complex, and thus massively expensive, weapons along the lines of the F-35 stealth fighter, the B-21 Raider long-range strike bomber, and Ford-class aircraft carriers are needed to accomplish our strategic goals. We saw this with the president’s $705.4 billion defense budget request that includes $2.8 billion for the new bomber and $11.4 billion for the troubled fighter. The advocates of these programs often justify the cost associated with them by saying that their mere existence holds our potential adversaries at bay....