The point about low IQ being a cause of the gap between those who succeed and those who will be shut out and therefore struggle is easy to see. When you think about it, every occupation has a minimum I Q required to be even minimally competent at that job. The lower the IQ the less number of jobs you can potentially perform and the pay is always lower down there. Checkmate, most of this social engineering is simply useless.
There is another dimension of thought life called Wisdom which is not even evaluated by the modern psychological tests.
With Wisdom, one might not need to be an Einstein to deal effectively with challenging issues. That is the difference between strategy and brute force.
That’s my thought on the matter, actually, and automation is making a whole lot of people even more “expendable”, in that aspect.