While I no longer live in the U.S. and would never return, I grew up there & did benefit enormously from access to public academic institutions and to the Federal grants in science research that allowed them to thrive. Seeing this whole apparatus dismantled and sold-off for scrap is beyond sad. Finally the party that has striven for so long, since at least the late 1950s, to eliminate public education - and perhaps the whole academic enterprise is on the verge of achieving results beyond its wildest imagination. I hope that they are satisfied now; but doubt they are.
And if knowledge workers are more productive, then knowledge work is cheaper. Cheaper knowledge work increases demand for knowledge work. So the number of workers required might actually increase. It also might not, but first order analysis that assumes decreased knowledge workers is not sufficient.
C.f. garment makers. Partial automation of clothes making made clothes cheaper, so now people have closets full of hundreds of garments rather than the 2 sets our great-grandparents likely had. There are now more people making garments now than there was 100 years ago.
Freelancing as a high critic is a tiresome job.