The study doesn't say it went into the 1%'s pockets. It says it went to 2 places:
1) The salaries of corporate employees
2) Shareholders and capital owners
Regarding number 2: "Shareholders" would include anyone who owns any stock at all, including a lot of middle class people with a simple S&P 500 ETF in their portfolio.
And the increase in productivity allowed more people to become capital owners, AKA entrepreneurs. The explosion in software entrepreneurs, for example.
1) The salaries of corporate employees 2) Shareholders and capital owners
Regarding number 2: "Shareholders" would include anyone who owns any stock at all, including a lot of middle class people with a simple S&P 500 ETF in their portfolio.
And the increase in productivity allowed more people to become capital owners, AKA entrepreneurs. The explosion in software entrepreneurs, for example.