Business is teamwork just like in sports where there are so-so players and there are star players. It is only normal for the management to put too much trust in their star marketers because they bring in more business than the ordinary marketers. But do you think it is right to be that way? There is a tendency for the ordinary players to feel envious. Maybe that is the principle of the confidentiality of the salary so that envy will not play a role since the employees have no idea of the exact salaries of their co-employees.