how the hell can the u.s. just appoint a new afghan prime minister to "bypass karzai"? doesn't afghanistan have a constitution, one that these same western powers basically wrote for the country? don't they remember that the document has a process for choosing leaders of the country that doesn't involve outside nations simply installing one? the constitution doesn't mention a "prime minister". are they just going to scrap the system of government they've been trying to instill for the past 7 years and start over?
this is an election year in afghanistan. if the afghan people don't like karzai, they can dump him for someone else. maybe the western powers fear that the situation in afghanistan won't allow a free and fair election. but if that's the problem, the solution would be to try to improve the security situation. if foreign powers simply appoint a new leader, it will just send a message that afghan democracy is a sham.