Americans do not know the foot-soldiers/helpers of Taliban/OBL in Pakistan so they need Pakistani intelligence to do that work. Pakistani intelligence/army under Musharraf - as we all know - wasn’t really sincere in eliminating the terror squads because of manifold reasons hence the innocents were captured and made them admit that they were the elephants.
That can work if they are busting a small gang, but for larger networks NO. But getting paid per head will definitely make them pickup any ‘foot’ whether soldier or not.