In The Conquest of Bread Kropotkin talks about the massive productivity gains of Europe in the age of steam and steel, and uses numbers to show how there's enough beef and mutton and bread and chicken to go around and enough trains to get it to everyone who needs it, such that we can look forward to a future where a worker gets much more for much less work. And we have hit that in some respects: a chicken is nearly free now compared to its historic prices, and the 40 hour work week was not widely established when that book came out. So we work less and get more now, but we don't work a few hours a week in exchange for a life free of any economic insecurity, as has always been on the horizon for technology optimists.