Workers are getting a smaller share of GDP while productivity keeps rising. Good for stocks?

Productivity rose again in Q2, but labor’s share of GDP just fell to the lowest level in the data going back to 1947. That seems pretty good for corporate profits in the short term. Companies are getting more output without labor costs taking the same share. What I’m less sure about is how far that can go. If workers keep getting a smaller piece of the economy, eventually somebody has to buy all the stuff companies are producing. Is this actually helping explain how margins have stayed so strong?