An clever journalist in the UK (and probably one who dreams of going on a cruise) has looked at what it costs to jail criminals in the UK annually, compared that to the per diem on a P&O world cruise, multiplied it by 365 and realized it would be cheaper to send the criminals on a year-long world cruise.
The article appears in London's Daily Mail.
If they switch to the "alternative system," expect a rise in the crime rate.