Is there a part of the world where drug smugglers are more easily able to bribe cops, government officials in?

order to avoid jail/prison sentences? i.e. costa rica, colombia, brazil, ect....? is cocaine the only drug in the world that is virtually illegal everywhere? in what part of the world is it easy to bribe law enforcement officials in order to smuggle illegal drugs? how is it that drug cartels are formed? through legitimate business people? how is it that sometimes international drug cartels are big enough to rival governments in size? between distributors, runners, and sellers who has the least likely chance of getting caught? can anyone bother to speculate? take your best shot.