I cannot see how increased automation without some pseudo-socialist redistribution of income is going to reduce working hours. We had lots and lots of automation over the last generations - and all it led to is still the same long weeks, overnighters, checking in to the company via smartphone. The jobs made redundant have been replace by bullshit pseudo-jobs like commnity managers and social media experts.
It's a shame you think community manager is a bullshit job. Do you want to work the forums two hours a day rather than code? That's what the "community managers" at my workplace do, and I really appreciate it.
But it's not community manager per se - I could have chosen grocery packers at the checkout too. I was trying to pick on fluff jobs that are only marginally useful and can only exist because they cannot easily be automated and add just enough of marginal value that companies decide to pay for it. I doubt anyone would notice if they were gone and replaced by an inferior automaton longer than 2 weeks.
The point is: we are not reaping the fruits of 150 years of fierce rationalization, but fight for the 10% indispensable employees, keep the majority employed whether it makes sense or not - and pay the rest just enough that they don't starve. Seems dysfunctional to me.