The countries that lack these things need some fundamental thing to be sustainable and grow in excess of their inputs. It takes resources to grow resources.
The poverty strucken parts of the world don't have sustainable infrastructure or the capability of building it.
The problem is obvious but nobody wants to talk about it.
If I had responsibility to do something good, it needs to be on my own terms and I decided how it were to be used then maybe I would want to help. But if it is going to be lost to corruption, abuse, drugs then that's not the intended purpose of the investment.
Takes resources to get resources.
Also takes good management. If I'm investing resources, I don't want my resources being pilfered away.