That is, perhaps, a little harsh. I'm about as far from them on the political scale as is possible without being Atilla the Hun, but they do have one insight shining like a gem among so much donkey offal:
There is nothing natural or inevitable about what’s considered ‘normal’ today. Time, like work, has become commodified – a recent legacy of industrial capitalism. Yet the logic of industrial time is out of step with today’s conditions, where instant communications and mobile technologies bring new risks and pressures, as well as opportunities.
This is right in every respect, I think.
It is taken by many as an article of faith that there are 10x productivity differences in knowledge workers. If we actually mean that, then 2x differences in numbers of hours worked should be quite sustainable. As I've said before, why should my daily life be fit to the schedule designed to maximize the productivity of illiterate water loom operators.
Where this report gets really really wacky is assuming that everyone can do it, which probably requires massive amounts of wealth flowing around to support unproductive workers. That might even work, for a while at least, if you had some sort of unfair advantage which could conceal you from the market -- taxing authority, perhaps, or such a booming economy that you could afford extravagances like the demands of the United Auto Workers out of the petty cash drawer.
There are also hard limits on how much value can be wrung out of the labor of low-skilled people, and those hard limits work in pretty much direct proportion to hours labored. I think achieving income parity (and relatedly, working hour parity) between them and high-skilled workers is probably a lost cause. I can sell software while sleeping, a trader can act as a productivity multiplier on millions in capital at the click of a button, but this floor isn't getting swept until somebody actually pushes a broom over it for an hour. (Oh, more bad news: robots can already do that, and it will only be a few more years before the cleaning company we outsource to figures out how to exploit that differential profitably.)