It makes global economic sense to 'dump'. It just doesn't locally.
And to counter my earlier point, it makes sense globally if you value profit the same everywhere. But profit made by people in low income is worth a lot more. So are capital investments by those people.
This is the result of those people 'consuming more'. In more humane terms, this is the result of poor people having more of a need for money. But that is 2 different ways of saying the same thing.