High salaries incentivize people to do difficult or unpleasant jobs  Some jobs are extremely difficult or unpleasant. Consider a doctor, who trains for many years, often unpaid, in order to do their job – and the average doctor’s salary in the USA is close to the proposed cap, and surpasses it with merely 5 years experience1. Or consider a sewage worker or firefighter, whose job is one that many people would not want to do. High salaries are a good way of encouraging people to do these jobs; limiting the ability to pay high salaries will mean that some vital roles may be less appealing, and the job will not be done.  1 Payscale , “Salary for People with Jobs as Physicians/Doctors”, July 2011