The corruption was there before the military coup. I think the only coup that did not involve prior corruption was the one against Mosaddegh (and still, the country was still corrupted from his predecessor). Also this was probably the coup that finished any hope of peace and democracy in the middle east.

Not many people here probably know who Mosaddegh was. So for context, he speaks of the 1953 CIA backed coup against the iranian elected president Mosaddegh, who nationalized the oil from foreign companys. Which the foreign companys and their governments did not like. But, I am not sure if all would have been peace and harmony without that coup. Sudden oil richness in a very, very poor society, is just very hard to do right.

It’s possible, but since we made it a priority to mess them around for decades, we will never know what would have happened.