Instead of paying for the crime with time, we shorten the time, in exchange for dozens more community service and fines. Stole a $60 purse? $6000 fine, and 60 hours of community service!
And it would grow like so. Killing would be turned into the victims age multiplied by five in hours of community service and their age multiplied by 1000 in fines. So if a 17 year old gets killed, the killer serves 85 hours of community service and must pay a $85,000 fine. Boosts the economy and keeps the prisons from overflowing!