Once upon a time there was a Criminal Justice Act every ten years. Now they come thick and fast as governments decide that there are too many/too few people in prison or believe they have the answer to recidivism.
As to the first, the judges have said that the Acts are drafted so badly that even they don't understand them.
As to the second, there is no magic cure to recidivism. Believe me, I have lived through them all. (Just reflect a moment on the last occasion when a government decided that short prison sentences were undesirable. The prison population shot up.)
Why does this idea matter?
Penal reform is too important to leave to politicians.