I think I'd prefer progressive taxation to a maximum wage which the very rich would get around via an army of tax experts, financial advisors and lawyers.
In 1933 President Franklin D. Roosevelt proposed a maximum wage. When faced with a revolt by the super rich, who screamed communism, he struck a compromise: a top marginal income tax rate of 94%. Close the crazy tax loopholes and enforce the law in a progressive tax system. Introduce a REAL living wage for all.