If you had the power, would you fire them and be the one to give them their notice in person? If they asked why, what would you tell them? "For your own good"?
Someone could for example give them the same working protections offered by a German contract. The same work hours. Same wages?
Someone would not have to let them go.
Though you did say "I was so abusing the lower deck people" which, given you didn't want to fire them, implies their normal life would have been even more abusive. So wasn't your company actually helping them already? Isn't that something to feel good about? You were making their lives better. Not as good as your own, but why is that the standard?