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.
"FACEBOOK COO SANDBERG: The Women Of My Generation Blew It, So Equality Is Up To You, Graduates" by Sheryl Sandberg, www.businessinsider.com. May 18, 2011.