For some reason, people keep forgetting about Herbert Hoover, the only President to never accept ANY salary during his ENTIRE public life, from 1914, until his death.
He also paid his assistants, (out his his own pocket), an extra amount, while he was President, since he believed they were underpaid as government employees. NO other President has done this.
Check the Hoover Presidential Library or an actual book written about his life, not just Google. http://hoover.archives.gov/ http://everything2.com/title/Presidential+perks