Garret and Abraham were great scientists at the peak of their respective fields. The former was an acknowledged genius who stayed true to his title, while the latter had lived and breathed science for most of his long life.
Nevertheless, the Global Army had no shortage of other similarly prominent figures, especially among the noble echelon. Great scientists littered humankind, pushing innovation forward with each passing year.
So, Khan could believe someone might achieve better results than his scientists. He knew he kept them busy and overworked anyway, and science occasionally was a matter of luck and sudden enlightenment.
Besides, Baoway was no stranger to spies. Countless parties had joined its social, military, and political array, leaking classified information to secretive networks.