Like Marx said, "The most developed machinery thus forces the worker to work longer than the savage does, or than he himself did with the simplest, crudest tools."

Technology doesn't mean wealth for the people, except with the appropriate politics (paraphrasing) - Aaron Bustani.

Consumerism is the bane of society, fostered by credit card/loans systems, ever since it was created post 1950s. Like Keyenes prediction of cheap capital to 15 hrs working week, I suspect he underestimates capitalism's ability to always finds ways to reinvent itself. And as long as the banks and "bullshit jobs" (David Graeber) are around - work and debts prevails.