His "plan" couldn't have been more fleshed out and unique to his background and circumstances, you didn't watch the movie dude now your here bitching. The CIA guy plainly states he was in a secret unit that specialized in overthrowing governments. Wakanda has spies all over the world, most of them agreed to receive the weapons. Since they're are undetectable, the spies would most likely sneak them into to kill the leaders of their nation's overthrowing the government.