There are also barriers to entry to becoming a plumber. And there's no reason a plumber couldn't easily become the CEO of his own plumbing company. People are

There are also barriers to entry to becoming a plumber. And there's no reason a plumber couldn't easily become the CEO of his own plumbing company. People are largely in charge of their own destiny in America (as well as many other countries). No one is made a CEO by birthright.