Yes, I have read Keynes’ Economic Possibilities for our Grandchildren. He was talking about an economy which was 8x his by 2030. We already have a society 8x his, but we are working – not 3 hr/day, but still much less than they did in his time. In 1930 people worked an average of 69 hours a week; now the average work week in the US (including vacations) is about 33 hours.
Thing is that we need more. And by that I don’t mean only “stuff” – possessions. Yes, our houses are twice as big – well, if you lived in the average British hovel in 1930 you’d have wanted more space too. We have hugely better medicine – yes we spend too much for it in the US, but on the plus side life expectancy at birth has risen from 61 to 79. We have refrigeration – that deserves a place all to itself – food storage, air conditioning – considered to be the most important invention of the industrial age – maybe excepting the steam engine. We spend the great majority of our incomes on services – housing, transportation (cars mostly), education, medical, legal & financial – and far less on food and clothing than in 1930. Keynes did not take into account just how much income would be needed to make the lives of average Britons good – as it turns out, it needed to increase more than 8x to push hours down to 3/day.
IMO, though, what is needed is not more income as such, but primarily different organizational arrangements – I think we need more communities, so that people’s sense of belonging can be enhanced, and mutual support structures can be strengthened. And I doubt that government can do that. It might be that social media can help with it, but evidence I have seen suggests that rather than creating a sense of community, people who spend more time on social media actually feel LESS integrated into a community. Equality of opportunity is important. Technology can be helpful, but I think the future is people rubbing up against each other and figuring out how to get along. But hopefully in smaller groups, in which people know and support each other.