I see what you are saying. Technology always disrupts entire industries with painful consequences for those left behind, I'm not quite certain we are at the inflection point that leads to a post-labor economy or will be in 30-50 years. It's a weird conundrum because in the meanwhile, population growth is still a big driver of economic growth. Demographics shape way more than policies ever could. Countries with significant ageing issues because they stop having kids have stagnant to no growth. It's already happening in a lot of the developed world. Japan has been there for awhile, it's going to really hurt China as the one child policy had tremendous impact on the demographics and it's starting to occur in Europe. The number of kids per family in the US has gone down as well, we have just offset that more with immigration, which will probably start becoming more and more difficult with all the anti-globalization rhetoric these days.
With entitlement programs for a larger older population, that burden becomes too much to bear on the younger generations unless we find solutions to those issues as well