The US isn't the world. The US has many traits that are peculiar to it, and not universal to economies that are becoming increasingly automated. The world has seen more wage growth over the last 20 years than any other period in history:
Well, but doesn't that mean that you already have a counter-example? In the US it IS the case that rich is getting richer and the rest aren't really benefiting too much from all this automation.
The world is certainly doing better, but I also have to wonder how much of this is thanks to automation, and how much thanks to the fall of colonialism over the past century.
US Hourly Wages for nonsupervisory workers has certainly grown over the last 20 years, but not in the past 40 years [2].
[1] https://fred.stlouisfed.org/series/MEHOINUSA672N
[2] https://en.wikipedia.org/wiki/Household_income_in_the_United...