The written article makes it clear that in the future, all cheap labor will be robotic. But parallel to that, there is the implication that future people can no longer look to simple manual labor jobs as a career. As this trend progresses, there will be NO EXCUSE to not get an education, because the dumbed-down jobs will no longer be there. People who got useless degrees will now be pushing out the totally uneducated people just for the privilege of asking "Do you want fries with that?" There will come a time when illegal immigrants will be completely unable to find jobs and may have to go back to their more primitive / less technological cultures because there will be no menial jobs to support them in the place to where they immigrated. It won't only be a language barrier but will also be an education gap that dooms them to continued poverty.
In the future, more than even now, survival of the fittest will have to include "mentally and educationally fit" as part of that survival assessment. Assembly-line jobs, whether in appliance manufacture; vehicle assembly; millinery and clothing assembly; or bulk-food preparation and packaging, will evaporate. Self-driving cars aren't quite right yet, but eventually even "chauffeur" and "delivery driver" jobs will become diminished. Aerial drones are already taking over some deliveries, particularly in high-crime neighborhoods. Self-driving vehicles also exist and are getting better. High-school dropouts will instantly or eventually become homeless. The ones who are physically fit might volunteer for military service, but with modern weapons that require extra training, the REALLY dumb folks might even become too stupid to be anything other than cannon fodder - or maybe not even smart enough for THAT purpose. You know you have a problem when the "smart bomb" is smarter than its targeted population.
Along those lines, I remember almost 60 years ago, in the USA I had to go in for my draft board physical because it was the Vietnam War era and registering with the U.S. military was mandatory due to active conscription. I was doing OK on the written tests but one of the young men drafted with me at the same time was barely able to even write his name, yet he was a product of a USA school system - that had clearly failed him. I had a chance to ask the persons running that facility what would likely happen to the young fellow, because I felt pity. They told me that if there was reason to believe his IQ was below about 80, he would be rejected because such people cannot even follow orders on the battlefield when under fire. I don't know what happened to him. I eventually reached 1-A status but they were running a "birthday lottery" at the time. My number was 283 but the draft only took up to 183 that year so I was never called up.
I am also reminded of Aldous Huxley's Brave New World in which it was really GOOD to be an Alpha (high-IQ) and not very comforting to be an Epsilon (abysmal IQ). We sometimes bemoan George Orwell's amazing speculations / predictions in 1984, but he wasn't the only writer of speculative fiction to have chilling prophecies.
