The word you need to use is 'slaves'.
United States | News & Politics
They get paid almost 7 bucks an hour to risk their lives. Great deal!
Per day
Don't forget about their free housing accomodations! Those are worth at least $300 a day.
They get paid, so it's more like serfs.
Just need a consultational amendment to change it. Getting 3/4 of states to agree on anything is going to be nearly a miracle, let alone that thing being the rights of the cheapest labor pool they have.
Some context from the article was left out of OP's summary:
The department said inmates would work cutting fire lines and removing fuel from behind structures to help slow the spread of the blazes - as well as serving in wider support roles at the camps, including cooking, laundry and water treatment plant operation.
Some further, even more important context from the original CBS article mentioned in OP's article can be found here: