Corruption is an endemic disease of political centralized systems
Africa is just a micro cosmos of corruption of the macro corruption that the neocolonialists impose.
Any zone in Africa, were the neocolonialists find some rich natural resources, then local corruption and power abuse and even killings are made, always protected by the "invanding" foreign potentiates that are the main "corruptors" of local authorities
But notice that the budgets are very small and they steal 90% of nothing, while every corruptocrat in Europe steal only 0,5 % of budgets of millions, and nothing happens to them.
My youth was in Africa , Mozambique, but I go every year to Angola and other Portuguese speaking countries, and it's the same all over Africa. Power rules
But rich countries the "invaders of the lost ark of natural resources" could stop corruption instead of facilitating it, because of their own "self-corrupt needs"
Never forget, corruption will end only if the conspiracy of "source-code" overthrow the "centralized systems society " and prove in practice the value of decentralized autonomous organizations (DAOs)