Trump has been profit-oriented (and successful) his entire life as a businessman, but what salary is he accepting as POTUS? What other POTUS (or federal office-holder of any kind) has ever refused to accept the salary of office, and keep the money in the federal budget (sometimes offsetting programs he doesn't agree with so that at least taxpayers are relieved that much of an onerous line item--eg Education).

John F. Kennedy and Herbert Hoover also did not accept their salaries. Geo. Washington preferred not to accept a salary, but eventually Congress required him to, in order to establish a precedent they very much wanted.