My point is that when one seeks to undermine the very foundation of the tribe, such as violating the cultural commandant for hospitality by betraying bin Laden, the money motivation probably will not work. But if the motivation is in alignment or at least not inconsistent with perceived tribal integrity, I think it can buy compliance for a while. As I said, if the timing is right, this could be enough.
In effect, this is how Clive conquered India with only 900 men. He divided and bribed.