>Here in germany we don't turn prisoners into slaves.
Do you tell them where they must live and how they must behave? If they disobey and go about their daily lives ignoring what you tell them (meaning they don't even show up for prison) do you use force to make them comply? Even if you don't profit off of them, that is still a form of slavery. And to be pedantic, the people who are forcing them to obey are making a profit because they receive a paycheck for their actions, one they would lose if they didn't force the prisoners to behave. The state may lose money, but the actual people running the prison are profiting off enslaving prisoners.
Do you tell them where they must live and how they must behave? If they disobey and go about their daily lives ignoring what you tell them (meaning they don't even show up for prison) do you use force to make them comply? Even if you don't profit off of them, that is still a form of slavery. And to be pedantic, the people who are forcing them to obey are making a profit because they receive a paycheck for their actions, one they would lose if they didn't force the prisoners to behave. The state may lose money, but the actual people running the prison are profiting off enslaving prisoners.