This would be a feature used for purposes of recovering Loans.
If a loan is due and has not been payed for. It would be a similar system as porter but automated.
A banker triggered system.
A player (Active or not) would receive a warning for overdue loans, and have 7 days to take care of matter or talk to banker for compromise.
If matter isn't taken care of and banker doesn't cancel request Player will be arrested, all ships would be confiscated/or sold.
In the detention camp/Jail the player would have to work manual labor where he would burn incoming turns to generate income.
All income would be sent to banker to pay for said loan.
At any time the banker may "forgive" or give "second chance" to Player.
If player is active he can choose to do extra manual tasks to generate more income.