The problem is far more than one disgusting old man, it is the method that is the problem, the practice of a class-based ideology that is modern socialism, that enables a political party to affix itself to a society like a leech and suck it dry.
It is a political disaster of the first order that this became so fixed into the post-colonial movement within the European academy that the latter is now virtually indistinguishable from early-stage Marxism. But that is where the current generation of African leaders was nurtured and educated, and they were, once they returned to their native countries, an educated elite within relatively uneducated societies, which is Marx's dream come true. It is one of his base premises that the perquisite of power is plunder and that it has always been that way - if these new elites tended to act on that premise who could blame them?
But were that really the case the societies built around it would resemble their predecessors instead of becoming uniform economic basket cases. It is, in fact, a deeply flawed premise kept in place by two of the basest human emotions, envy and greed, papered over by a promise of a better world that never arrives.
And as the victim society's surplus diminishes so does the circle of its parasitical beneficiaries. The fellow convinced that Zimbabwe can support 6 million people has calculated it on the basis of the existing plunder to be had. He does not expect that to be six million subsistence farmers in a peaceful agrarian paradise. This paradise has limousines for the lucky and rifle butts for the rest. If the six million cannot be sustained by the surplus of others then it will become three million, then one, and then like all parasites the ruling class will drop off and look for another, richer host.
Do not look to the UN for help - it is peopled by precisely the sort of post-colonial educated elite that has attached itself to the groaning people of Africa. Failure is their norm and they hate the successful for their very existence even as they look to them as hosts.
Karl Marx, the founder of communism, was a parasite, himself, living off his family and Engels while despising them all. Two of his daughters committed suicide and his family life is an object lesson to anyone that's interested in the founder of communism.
He never worked a day in his life, used 1820 documents in his "Das Kapital", which was published at least forty years after the abuses had been corrected by Parliament. He abused his own servants terribly. He was the deeply disturbed grandson of two distinguished rabbis, and a spoiled brat, to say the least. Che and Pol Pot come to mind, two other rich spoiled brats that decided to play god.
Okay, I'll calm down now and get off the soap box.)