"I have not seen him focus on Welfare with anything approaching the same vigor."
I think this might have something to do with the scope of the Presidency, and what can actually be done once in office. IOW: the President has quite a bit of control over the military, but not so much over Congress.
"Why does Ron go ape over the cost of the War on Terrorism.."
Not only the cost in terms of money, but lives of our military personnel, and the overall loss of freedom to Americans. Furthermore, the whole way in which it was "sold" to the American people and Congress was, at best, misleading. IOW: the "WOT" is extremely expansive of the Executive Branch, and yields continual military action anywhere in the world, and against anyone the President wishes. Knowing the propensity of humans to aggregate more power to themselves, it could also mean government troops taking action against its own citizens.
That's how I would answer if I were Ron Paul.