This highlights an additional problem with the Lewkowskian philosophy on why the poor are poor and the rich are rich; if someone had $50k available to invest in the stock market, they could have invested yesterday, and then just wait and dump the stock whenever it goes above $40 - $45 and make more sitting on their ass doing nothing but watching their money grow than someone working 40 hours a week, 52 days a year, earning minimum wage (so long as it goes above $40 - $45 per share in under a year from the time they invested).
Or tl;dr - Those with more disposable or non-essential income have a greater opportunity to grow that money into more money, and earnings can be completely unrelated to the amount of effort put in to attain them.