I disagree with you, Simon, and so do the facts. More specifically, restorative justice is more effective than retributive justice at reducing recidivism rates. (Granted, restorative justice is a bit more than "education," but it fits that broad category, and is pretty much the opposite of retribution/punishment. Unlike retributive justice, restorative justice also benefits those harmed.) Google it yourself. Here's just one article: https://www.eurekalert.org/pub_releases/2016-07/shsu-rrr072716.php