When I was a flight instructor, I trained two indian students for multi engine commercial certificates. They were both the absolute worst, already certificated, instrument pilots I had ever flown with. Regularly 30 degrees off course and 200 to 300 off altitude, and got mad at me when I told them they would never get a sign off from me until they showed up prepared and flew well within PTS. It was absolutely miserable, and I can't imagine how much money would have to be enough to train another indian student. They didn't want to learn to be good pilots, they just wanted the pilot certificate.