This document discusses the different justifications for sentencing and imprisonment in the criminal justice system in England and Wales. It outlines five traditional models of sentencing: retribution, deterrence, rehabilitation, incapacitation, and restoration. While the 1991 Criminal Justice Act prioritized the retribution model, the 2003 Act stated that courts must consider punishment, crime reduction, rehabilitation, public protection, and reparation. The document examines how effective imprisonment is in achieving the goals of each sentencing model and raises questions about whether alternatives may better accomplish the purposes of the criminal justice system at a lower cost.