Imagine that the United States were spending an amount that exceeded 60% of its national income on the military and police. (For comparison, the US department of defence budget – bloated as it is – is about 5% of GDP; and spending on police is less than 1% of GDP). Of course the United States would never reach these levels of spending, but it's worth thinking about because any population in this situation would be looking for a way out of the horrific civil conflict that got them there. This would no doubt be true even if foreigners were fronting the money.
And so it is true for the people of Afghanistan, where spending for the army and police is programmed for $11.6bn (61% of projected GDP) in 2011. If that doesn't fit the definition of "unsustainable", it's not clear what would.
Not surprisingly, the Afghan people are looking for a way out. They want negotiations to end the conflict. But the United States says no. The US and its Nato allies are preparing for a major military offensive, perhaps the biggest of the war so far, in the southern province of Kandahar.
A poll sponsored by the US army showed that 94% of Kandahar residents support negotiating with the Taliban, rather than military confrontation.
http://www.guardian.co.uk/commentisfree/cifamerica/2010/apr/23/usforeignpolicy-afghanistan