But what happens most of the time in these unstable African governments is that they gravitate from one extreme to another: Either they enforce zero workers rights and exert very little control over foreign investors - allowing them to pay bribes to individuals rather than taxes which would benefit state run institutions. Or they nationalize every last farm and shop in the country, scaring away foreign investment and know-how and end up with lower productivity and mismanagement of local industries.
And if toxic investors are clever, they might even support every major candidate a little: they have already reached their goal if the eventual winner believes that his secret supporter was acting as kingmaker. Might be much cheaper in total than actually forcing a result with money.
The international community / western marketplace obliterates any country that dares expropriate / nationalize the lands of the (white colonialist) landholding class.
Just look at how the West has cut off Cuba and Venezuela.
It defies the "african countries are poor only due to the oppressive white colonialism" narrative.
EDIT: As for Venezuela, 1 USD was ~6-7 Venezuelan bolívars in 2013.
Last time I checked it was roughly 1,100,000. A staggering 180 000 times drop in only 5 years.
External political climate remained roughly the same in that time span.
The US cut off Cuba, but even with US retaliatory sanctions much of the rest of the West did not.
Actually I believe that for a country rich in cash crop potential, some form of communism might actually be not so bad (e.g. free market with a strong legal bias favoring the formation of co-ops in agriculture). Certainly not worse than an economy dominated by a few plantation lords (doubly so if those are foreign entities), if that's the only alternative. I wouldn't suggest anything for Ethiopia though, wouldn't suggest anything, just too dang little knowledge about the place (and my personal threshold for feeling comfortable with playing armchair president is embarrassingly low).