Earlier quoted context omitted.
Economy is closer to a zero-sum game, after all theres limited resources in a period of time. We cannot be all rich because we cannot all own the capital, if we did, who does the work? To invest you need workers, to produce you need consumers, to rent you need renter, etc. Then the rich class exist because theres a poor class, a zero-sum game.
You can be rich, invest, and still work. You don’t magically putter around all day once you make money. Or at least all the self-made wealthy I know are still actively productive.
The person who "earns by investing and working in both nearly equal proportion" doesnt really exist beyond outliers, this is empirical, the 1% owns as much wealth as the entire middle class, this is where their yearly income comes from,they get money because they own stuff, not by being superworkers, otherwise the inequality wouldnt be growing.