(There's no legal minimum wage in the country, though collective agreements have legally binding minimum wage clauses in branches of business where they are applicable.)
Societies that confuse prison with vengeance have more crime, and end up worse for victims themselves.
In feudal times violent crimes, thefts, etc, and especially murders and rapes, were at rates way beyond today.
From the article:
>...though the CSA is responsible for figuring out how much of that goes to the prisoners...
Are you sure they're getting paid, right now?
>...not using that money to help the victims...
And, at what point, would this vengence form of justice stop? How much would be "adequate" for compensation to their victims? Are they still not penalised, even after they've "paid their debt to society"? ....because, last I recall hearing of the prison system in the United States, the punitive punishment doesn't really end - from being unable to vote to being unable to get a job because of a record to a number of other maliciously designed rules/laws intentionally meant/designed to further punish them, yeah?
Earning "okay" money for prison labor is also pretty normal Europe and can give prisoners something to fall back upon once they are released, as well as new skillsets.
If you didn't pay them, prisoners may also end up not working at all. Unlike in the US, slavery there is completely illegal even in prisons ("penal labor"). You can't force them to work by punishing them.
There is nothing to be outraged about, unless you're being blinded by a reprehensible and base thirst for third-party revenge.
Not to mention the rehabilitative effects - you want convicts looking for delayed gratification and honest work instead of big scores.