U.S. Egging on the Military to Lord Over Pakistan?

Foreign Policy Magazine has published a curtain raiser to the Pak-U.S. strategic dialog by David Rothkopf. Says the writer:

"The Pakistani delegation will nominally be led by the country's foreign minister, Shah Mahmood Qureshi. But the real focus will be the man who many feel is so powerful that the fact he is not yet president reflects only a personal choice on his part. As Pakistan's top military officer, General Ashfaq Parvez Kayani might as well be known as General Plan B. If the current government stumbles, if unrest spreads, U.S. officials are fully counting on him to step in and put a lid on the problem."

This begs a question: How long have 'U.S. officials' been egging on Gen. Kayani to lord over the country's civilian government - and to stand ready to 'step in and put a lid on the problem', 'if the current government stumbles, if unrest spreads', etc.? On an optimistic note, Gen. Kayani must be a man of parts through and through to have withstood this kind of temptation, to have made 'a personal choice' to be 'not yet president'.