I can't do a better job than the much maligned Charles Murray. To not be accused of being racist in this book he only looked at white Americans: https://en.m.wikipedia.org/wiki/Coming_Apart_(book)
The "majority" doesn't benefit from automation, they're thrown into more and more meaningless jobs at the bottom of the ladder while the people working on automation and the companies implementing automation are thriving. Wealth inequalities being at an all time high would agree with that
> Meanwhile, real family income for families in the middle was flat. Just about all of the benefits of economic growth from 1970-2010 went to people in the upper half of the income distribution.
https://alexandbooks.com/archive/coming-apart-by-charles-mur...