It is now commonplace to criticize corporate CEOs within progressive political circles, so it is no surprise that San Francisco, one of the most politically progressive cities in the country, has proposed a tax on CEOs. But just not any CEO, only those with exceptionally high salaries compared with others in the company. Dubbed the “CEO Excessive Salary Tax,” the proposal would tax a company’s gross receipts depending on the difference between its CEO’s pay and the median salary of its workers.