From the New Yorker article -

Espionage hinges on human relationships. “The best assets I ever ran weren’t in it for money,” Skinner said. “They had this urge to be part of something bigger. It wasn’t patriotism—they just wanted to be part of a high-functioning team.” But most assets could be trusted only in a very narrow context, and locals routinely sought American firepower to back them in personal or tribal disputes. “They might tell you it’s to help their country—they know we love to hear that—when it’s actually revenge,” Skinner said.
Hmm. Tangential reading, for anyone who missed it.
http://council.smallwarsjournal.com/...tarted-in-Iran