The average salary of the main players of the team is very high. Because they represent the best of the profession and they are the best of the country's thousands of players each year. They must not be paid more than the average businessman, doctor or lawyer. They must be paid more than the big business, the best surgeons and the partners of major law firms.
The author's point of view is that the main players need the same skills as well-paid businessmen, doctors and lawyers.