While you are never going to straighten out every hardened crim, turning more of them into decent citizens seems a much worthier aim than seeing how many you can stuff behind bars and how long you can keep them there.
The United States boasts the world's highest per capita prison population and anyone who watched Trevor McDonald's recent television series will know that the policy there has been to lock them up and throw away the key.
Thousands are in jail with no chance of ever getting out, yet the crime rate in the States is still among the worst.
So let's hear about some policies to boost rehabilitation programmes, take out the fear factor and acknowledge that crime is actually decreasing.
It's a worldwide trend, largely down to technological advances that have boosted security, making it harder to steal things.
In New Zealand, youth crime is down 27 per cent this year and Principal Youth Court Judge Andrew Becroft credits, not more punitive measures like "three strikes", but by avoiding criminal prosecutions and using restorative justice practices.