That is wealth, he is talking about the derivative of wealth or income. Most companies pays out way more in salaries than they pay out in profits, so more money

That is wealth, he is talking about the derivative of wealth or income. Most companies pays out way more in salaries than they pay out in profits, so more money goes to workers than to owners. Giving all profits to workers would increase their income by maybe 10-20% in most cases, modern capitalism don't exploit workers that hard. Average workers are worse off today since more and more money is going to relatively small (in terms of employment) high value companies like hospitals, tech companies etc. So it isn't that low skill workers are giving up more and more to capitalists, it is that more and more money is going to other parts in the economy and never even going to the company the low skill worker is working for.