The not wholly surprising news that a key Karzai aide at the center of a corruption investigation is on the CIA payroll underscores, once more if we needed it, the tortuously contradictory mess that is U.S. policy in Afghanistan - for starters, simultaneously demanding Karzai root out corruption while funding it. Help Rethink Afghanistan here. "If we decide as a country that we'll never deal with anyone in Afghanistan who might down the road put his hand in the till, we can all come home right...