Spare me. Countries can figure their shit out pretty quickly when they aren't being attacked by rich foreign neighbors.
As an example look at Botswana. They are moderately well-off only because of low corruption and strong internal organization even though their neighbors are incredibly corrupt and have frequent political/military turmoil.
You also seem to be implying that African and Latin American people are just naturally more corrupt than the inhabitants of other nations which is a kinda bizarre theory.