I wouldn't pay for the nation building we have been trying for the past ten years because I wouldn't have tried it. I have invaded Afghanistan, knocked the Taliban off their perch, then withdrawn. If Iraq continued to flout sanctions, I'd have seriously considered doing the same thing in Iraq. I'd have gone for swift, punitive strikes to remove governments supportive of those who attacked us then made it clear I'd do the same thing again if necessary. All "nation building" does is leave a bunch of targets on the ground for our enemies to target. It doesn't achieve the desired result and the cost -- in lives and dollars -- is too high.