Disclaimer: I've been an industrial automation engineer since the PLC-2 and System 1 were king. I'm still at it, killing jobs wherever possible. Not out of malice, nor with any joy in that, but just doing my job.
TFA may be authored by a fuzzy-headed economist, but the core concept is undeniable. Humankind faces a surplus of employable bodies, and a deficit of employer positions, in the industrialized world. This trend can be compared to the situations in a lot of 3rd World countries. The industrialized nations, once fully built-out with AI and AA (Advanced Automation) will become 3rd world societies too. We're getting close to the tipping point already. There are only so many burgers to be flipped, and consumers with enough money to buy them.
Nature used to auto-correct overpopulation problems, with food supply vs. demand being the major engine. Is that what we're going to see when the whole world becomes third world? All the attendant unrest and upheaval will not be pretty.
My own solution: Enable and reward birth control wherever possible. Not as efficient as famine or genocide, but much less nasty.