Quoted in People, 26 Dec. 1977. Although now associated with Tomlin, this saying appears anonymously in Robert Reisner, Graffiti (1971), in the form "Remember, even if you win the rat race - you're still a rat." Rosalie Maggio, in New Beacon Book of Quotations by Women, states that William Sloane Coffin said "Even if you win the rat-race, you're still a rat" as a chaplain at Williams College or Yale University in the 1950s or 1960s.
George Orwell, Sonia Orwell, Ian Angus (1968). “The Collected Essays, Journalism and Letters of George Orwell: An age like this, 1920-1940”, Harvill Secker