I'm confused, why is it surprising that the CIA is the largest spy agency?
"You guys handle 80 percent of the intelligence workload. You're seven times the size of the CIA."
Edit: I realized after I commented that I dropped alphabet soup all over the uninitiated. NCS is the National Clandestine Service, which is the division of the CIA responsible for covert operations. Most people assume the Special Activities Division (SAD) is only the Special Operations Group (SOG). There are no "mercenaries" within SOG, only Specialized Skills Officers, whom are recruited and transfered from other Special Forces branches.