Advice from Sam Kinison comes to mind.
The first time I ever saw Sam Kinison was on a cable special from Rodney Dangerfield's club. I had never heard of him before, and had no idea what kind of act he did. That night, Kinison did his routine about solving the problem of hunger in Ethiopia. I had tears rolling down my face listening to him.
Africa's problems are largely man-made and the men who made them have largely been Africans.
Leaving for greener pastures only means they'll bring their problems with them.