Krugman is critical of our current defense budget but doesn't consider it "the heart of the budget issue":
The current Obama budget calls for defense spending of 3.4% of GDP by 2016; you can make the case that the number should be closer to 2%. But that’s not enough to avoid hard choices about health care and revenue. If you can’t see how it’s possible both to believe that we waste a lot of money on the military, and to believe that ending that waste would make only a modest contribution to our fiscal problem, I can’t help you.
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