TG--
OK, the accurate description of Shaw is that he was a "highly paid contract source."
If JKM and the CIA believe that to be true, then it was likely true.
So the CIA had Shaw "under contract" to provide information. So what? The contract may have been a formality of a sort.
Shaw was asked to perform certain tasks, and if he felt he could, then he did.
There is little doubt Shaw was a CIA asset, and evidently important in the 1950s, important enough to be "highly paid."