This doesn't say “prison labor is slavery”; it says that prison labor is allowed to be slavery. You should've provided some reference to e.g. a news article to back up your claim.
It's legal to paint yourself blue and write obscenities on your face and walk into a library, but that isn't evidence that anyone does it. (Likewise, it's legal to make people pay you fifty times the inflation-adjusted value of a loan you gave them – things being legal isn't evidence that they don't happen, which would be absurd.)
I happen to know a little bit about what goes on in US prisons, so it's confusing me why you're not providing any of the mountains of evidence to support your point.
> Don't be snarky.
> Please don't comment on whether someone read an article. "Did you even read the article? It mentions that" can be shortened to "The article mentions that."
And that is also against the rules:
> Please don't post insinuations about astroturfing, shilling, brigading, foreign agents and the like. It degrades discussion and is usually mistaken.
If you despise the rules so much why do you even keep coming here?