Uh, 51 uses 'undesirables' not meatbags. That's 47's shtick (and 55's.) I have used him on my healers from 1 up to 60 (not quite ready to send either one into KOTFE as yet.)
And my favorite quote was probably:
"Commentary: I will refrain from eliminating undesirables unless you say otherwise, Master. Please say otherwise."
(I think this was from entering one of the underground dwellings on Tatooine, probably the Czerka storyline where you had to find the retired employee.)
*Proudly uses the Meatbag Legacy Title*