They should have to clean the jail. The story of his detention is bad enough, but the fact we treat human beings in this way simply because they’ve been detained - guilty or not - should be profoundly objectionable to everyone. But there seems to be this emergent belief that jail is supposed to be a house of horrors and the punishment is the horrors of the jail itself, rather than being deprived of freedom.
Jails should be safe and clean, not traumatizing and filthy. The jail isn’t meant to be cruel and unusual punishment, but it has become that.
I admire how Norway treats Anders Breivik. The guy decided to become a monster. Norway decided against becoming a monster. He is in prison, because he cannot be free. His biggest problem in prison seems to be an outdated Playstation.
In his case there is no expectation of reform, so his punishment is not meant to educate him, it basically just does what needs to be done, without being cruel. In OP's case, I think it is reasonable to expect some conversion process. Having to clean the jail sounds like a good way to learn some humility.
It still would not be the same. They would have to be pulled out of their lifes randomly without knowing why and how long it will take.
Maybe a factor could be applied to account for that uncertainty. n * 17 days in jail, where n will only be announced after the fact.