Wouldn't it be much easier just to post bail?? You give the jail 100 krunas and if you aren't back at the jail by the time your sentence would be over, you get fined double and have jail time. Most new players have 600 krunas so they could easily post bail, or y'know, accept jail as it is and read a book or smth until your sentence is over. like a couple ppl said already, this isn't real life, so it doesn't have to work like real life.
While some comments made sound good, most are not easily implementable, or won't even work out soon after being added. We also shouldn't encourage players to break the law even further after being jailed. I read about an idea for a jail warden that watches over those that were jailed and kicks anyone that is AFK timing the sentence. I like that idea at first; however, it would be challenging to get dedicated players, or even enough of them, to baby-sit at the jail all the time. So, again, that wouldn't work out shortly after being a thing. Our current system works just fine as is, and likely won't be changed any time in the future unless the plugin decides to stop working entirely.