On serious note, this would help the city massively in my opinion, of course sentences would need to be adjusted etc etc, but it would at least make me think twice about what crime i was committing and what sort of escape plan I would use, Sure we would have the issue of people then AFK in prison, but this would in turn incentivise G6 to make the stay in prison fun and provide good RP for their time spent,
same goes for inmates, they would also have yard beef, get their strength and stam up and opens up the RP opportunities massively, things like conjugal visits, prison breaks, mass riots etc a thing!
When i first joined the city over a year ago, G6 was my first job and the amount of hours spent inside that prison were insane, so much fun RP was had and i barely made a trip into the city unless it was to go pick up another prisoner, I truly cant see an issue with this but obviously (police and G6) would need to do their part in order to make peoples sentences less boring and mundane, wiping tables and picking fruit should also still decrease sentences or maybe add some more jobs to help reduce their time such as laundry, collecting envelopes or parcels, maybe even getting some sport activities out in the yard for people to play each other with!