Not exactly Kitson's pseudo-gangs, but why haven't we begun an indigenous force consisting of defected/captured former insurgents willing to switch sides? Seems to have a successful track record in the past.
That's just it, they were trmendously successful in the past when applied with the appropriate degree of C2 and the JOC level, in concert with a well-balanced striking arm, and tied in with the paramilitary law enforcement arm.