The 13th amendment to the U.S. Constitution seems to facially disagree with you. It specifically permits criminal punishment as an exception to its ban on "slavery [or] involuntary servitude".
Making society pay for room and board of those that have committed a crime against it is inhumane. At the bare minimum, criminals should be required (not forced) to work, as is the case in some small number of states. In addition, criminals should be expected to make some restitution to society above and beyond this.
Criminals are not the victims, by definition. Society should stop treating them like victims, especially at the expense of actual innocent people.
"More than 76 percent of incarcerated workers report that they are required to work or face additional punishment such as solitary confinement, denial of opportunities to reduce their sentence, and loss of family visitation, or the inability to pay for basic life necessities like bath soap. They have no right to choose what type of work they do and are subject to arbitrary, discriminatory, and punitive decisions by the prison administrators who select their work assignments."
You might claim that "incarcerated workers report" isn't solid evidence, but if you read the report you'll find that much of it was confirmed by responses to FOIA requests.
I also have to work to afford soap. That does not make me a slave.
You are not required to work one, specific job that can be changed at a moment's notice without your consent to afford soap. Almost any work one might do in the market economy is sufficient to pay for basic hygiene products for one person.
I can't have any job I want either, nobody can. Criminals are not entitled to free room and board just because they have injured society. Criminals are not the victims, they are the criminals. They should pay for room and board and make restitution to society.
You can't have any job you want in the sense that you can't e.g. be President of the United States just because you want to. You likely (unless you happen to be in prison right now?) have a choice between at least two at any given time, though.
I suppose exactly zero of (to try to cover all political bases): Chelsea Manning, Julian Assange, the various January 6 convicts, the various people jailed after the George Floyd riots, or even those convicted of things they literally did not do are victims then. There are, always have been, and always will be "convicted criminals" that definitely don't deserve their fate -- though, to be clear, I believe some (not all) of the ones I mentioned do (and you'd probably be wrong if you guessed which were which). They are in the minority, but I'm not willing to deliberately hurt that minority just to also hurt the majority who arguably deserve it.
https://en.m.wikipedia.org/wiki/The_New_Jim_Crow
And if moving pictures are more your thing, there's a movie, too!