And it applies to other fields in the so called 'knowledge economy' as well. How many people in a given developed country really can actively participate because they have the required aptitude, geographical luck and resources for education? 30- 40%?

The Atlantic addressed this in an article a while ago. Just waving away the disenfranchisement of large parts of the population because they're unable to work mentally tasking jobs erodes human worth.

https://www.theatlantic.com/magazine/archive/2016/07/the-war...