I might be way off cue here but the rumours I hear it that the West is in Afghanistan, not to fight the Taliban as they have been essentially worn down to a manageable level.
The troops are still there to combat the worst of the external drug organisations and the impressive profits they derive from selling their muck to the West.
A check on the past 40 years or so of Afghanistan's income would no doubt highlight how this has shifted from a war on terror to the war on drugs.