Okay, I just looked at the panel in question. Leslie says something derogatory about Bruce and social class.
And two really weird things: Leslie's just grabbed a baseball bat to defend her clinic from (a couple of drunken thugs who want to break in and who don't appear to be very wealthy) And her comment's also in the context of treating Jason, who's been injured by a criminal--but the criminal's the Mad Hatter, whom Batman is trying to help on the road to lawfulness (he failed) and who obviously isn't particularly poor, since he can afford a giant flying hat contraption.