There's nothing wrong with slavery to begin with. You've made a false assumption that it's bad just because the foundation of your argument is based on what you think is good.
Yeah, silly me, thinking that treating a human being as a possession to be used or traded with no regards to what s/he wants is a bad thing. I really should give my head a shake.
Slavemasters should treat their slaves nicely by providing enough food and clothing.
Because that's all that matters in life. Being fed and clothed, not enjoying your own life. Not deciding if you want to be a doctor, a lawyer, an artist, or what have you. Not waking up one morning, and rolling over and going back to sleep...just because you can. oh that freedom. So overrated.
Slavery will never be immoral or unethical because it never was.
Fine. Come over to my place. i got some chorse for you. Not to mention a job or two for ya. We're gonna have to work on that gag reflex, of course. But first, let's get my brand on ya...don't worry. I'll feed you and clothe you...