
“No man can get rich in politics unless he's a crook.”
Variant: Similarly on pg. 136: "About this getting rich in politics. Like I said, you just can't do it unless you're a crook." And earlier: "An honest public servant can't become rich in politics." - Truman's diary, 24 April 1954.
Source: Harry S Truman, quoted in Plain Speaking: An Oral Biography of Harry S Truman by Merle Miller, 1973-1974 SBN 425-02664-7 LOC 73-87198, Berkeley Medallion Edition, October, 1974, Chapter 10. "The Only Defeat − and Then Victory", pg. 134.