I don't believe demand for labour has increased. We used to force children as young as 6 to enter the labour force, and people used to work 6.5 days per week. Demand for labour has been in free fall since the 1970, evidenced by stagnant wages in most of the developed world. Furthermore capital is accumulating at the top as the capital owners use their position to extract it from the people below them. AI will only accelerate this. We are in for some interesting times for sure.