The criticisms are pretty silly. Corruption is rampent in smaller programs without oversight (ie NGOs). Programs of this scale will have way to many eyes on it and performance metrics to lose much to corruption, plus, project managment will be mostly western. Also, even if there is corruption, what an awful argument against it, African's need power. Anytime something may have corruption it shouldnt be done? I guess that means we should send a dime more aid to africa, and close all their businesses, and never build power plants for them. Also, they have huge shortages in power, people connected to power don't have power. Let's fix that easy problem first then worry about those not on the grid (2/3 are not on grids, they have generators).
You want to save the world? Go buy as much made in ____ crap you can, as often as you can.