[the6threplicant]

You need infrastructure. You need petrol/oil to power the machines to build the roads so you can build the electricity to be able to build the internet connectivity that you need.

The nations are wealthy but if the profits are siphoned off by both corruption and the international companies that own the mines, then the citizens don't see any of that money trickle down to them.

In these countries the educated leave very quickly unless they're employed by any of the above.