Isn't the point still valid if you consider just the return on capital? If the market cap of the S&P500 was about 18 trillion in 2015 and returns 10%, the income going to to the owners of that capital is 1.8 trillion. In 2025 the market cap is 53 trillion, and a 10% return is then 5.3 trillion. That's an increase of almost 300%.

Now if the average salary was 48,000 in 2015 and there were 150 million people employed in the us, that's 7.2 trillion. The 2025 average is about 66,000 with 160 million employed. That's about 10 trillion. Around 40% increase in income going to labor. Am I missing something?