their living standards will start to decline.
What we have here in the starting post?
The picture of a economicaly depressed village in West Africa tell me nothing about the Human dignity of Sub Saharian people.
For example, in city of Messina (European Union) on one of the streets is present until today a open air canalization. And isle of Malta use no depurement structures to drain shit in Mediterranean Sea.

Toilet in Africa

Toilet in USA
In this way arguments of topic starter sucks deeply.
Sub Saharian People use normal living standarts.