In order to get experienced pilots to stay in Africa you need to creat incentives for them to stay. Various things are insanly expensive and when someone starts thinking about having a wife and kids this often encourages them to leave.
Operators are just as bad since they will hire low time pilots in the hope of saving a few bucks. It often bites them in the ass when their newbie pilot ends up crashing because the operator threatens him with dismisal if he does not fly into the thunder storm and deliver the overweight tourists with their mountains of luggage to the other side of the mountains.
I always wanted to bush fly before I became an airline pilot. It's real flying, and it's fun. But most importantly you gain valuable command experience. You often are in the middle of no where, where the regular rule book need not always apply because of the enviorment your in. You make logical and sound decisions. You don't have the luxury of hidding behind a mountain of support staff and wrap yourself in mountains of regs.