The U.N. and the WHO have been focused on Population control in Africa for 60 years.
Why do you think they lied about DDT? It saved 1 million lives per year from Malaria .
AIDS is largely a result of them teaching anal sex as cheap birth control.
They won't provide food aid unless they promote birth control and abortion.
The entire effort is a Eugenics policy so they don't compete for benefit from their own natural resources.
“Can’t move water without electricity!”
An old fashioned style windmill was on every farm prior to electricity in our neck of the woods. When the wind blew the windmill pumped water to a storage tank, which was mostly a cistern under the home. A hand pump was in the kitchen to draw the water. The windmills also fed stock tanks.
My point is, this archaic system is well suited for a backwards culture. It’s simple, very reliable, and it works. Using this decades old design would mean simple maintenance requirements that would require no high tech training or special tools. There is no need for over engineering in an unengineered world.
Problems with this idea are few would get rich off of it and local governments would have to allow implementation to name a few.