Besides being borderline incompetent on the battlefield (during the first four years of the Revolution, he lost every major engagement), the man who could not tell a lie started the tradition of presidential corruption. The whistle was blown by the Clerk of Congress writing under the nom de plume A Calm Observer in the Philadelphia Aurora, a muckraking anti-federalist newspaper founded, edited, and published by Benjamin Franklins grandson. In 1795, the Aurora published the Clerks detailed breakdown of how much loot Washington had taken from the Treasury beyond his Constitutionally-sanctioned $25,000 annual salary.
According to the paperwork seen by the Clerk, the Father of Our Country started out honest, drawing exactly his salary of $25K during year one. But over the course of the second year, he took $30,150, thus embezzling $5,150. In his third year, perhaps suffering a pang on conscience, G. W. took a little less than his entitlement: $24,000. He made up for it during his fourth year, though, by filching an extra grand.
In February 1793, as Washingtons second term was about to begin, Congress passed an act calling for the President to be paid on a quarterly basis (i.e., $6,250 every three months). But during the first quarter of his second term, Washington took $11,000 from the Treasury.