I think a guy in their first job, maybe because they expect to be a breadwinner someday, may be a little more money-conscious.
The workforce now skews female, and men have been hit harder by the recession, forcing women into the breadwinner role.
That translates into 5.1 million married "breadwinner moms."
also bread-winner, "one who supplies a living for others, especially a family," 1821, from the noun bread (probably in a literal sense) + winner, from win (v.) in its sense of "struggle for, work at." Attested slightly earlier (1818) in sense "skill or art by which one makes a living." Not too far removed from the image at the root of lord (n.).