The same pilots that fly the F-16 fighter.
These SA countries can't afford to properly train good pilot's, much less keep the aircraft fully operational. Venezuela had a Lockheed Martin C-130 simulator that was inoperable because they destroyed all the software for it. Unless the have full outside maintenance and pilot training, they will have junk in just a matter of a few years. These countries don't have the people with the technical knowledge to keep it operating. They may have money, but they sure won't spend it on parts or training.