and if the spending now boosts the economy, and decreases unemployment, then you will need to borrow less in the future - when the higher interest rates you fear may come around.
This is not saying "have never ending deficits". It's saying "this is the one time when a deficit is affordable, and a good thing, if the money is used productively". Fix your house while there's a sale on at the builder's yard.
Talking of spending on the military, did you see the second link from the Balloon Juice post?
China says US is spending too much on its military amid its financial woes
The chief of the General Staff of the People’s Liberation Army, Chen Bingde, told reporters he thought the U.S. should cut back on defense spending for the sake of its taxpayers. He was speaking during a joint news conference in which he traded barbs with visiting U.S. counterpart Adm. Mike Mullen.
“I know the U.S. is still recovering from the financial crisis,” Chen said. “Under such circumstances, it is still spending a lot of money on its military and isn’t that placing too much pressure on the taxpayers?
“If the U.S. could reduce its military spending a bit and spend more on improving the livelihood of the American people ... wouldn’t that be a better scenario?” he said.
http://www.washingtonpost.com/world/asia-pacific/top-us-military-official-meets-chinese-counterpart-in-beijing/2011/07/10/gIQAb8z57H_story.html?wprss=rss_worldThere's a sign of the times - the chairman of the Joint Chiefs of Staff visits Beijing, and gets advice on economic policy from his Chinese counterpart.