Because the question was asked, I would like to point out that when we were first hearing witnesses, it was made clear there was a 2002 study from the Department of Justice. The quote we've been using from that is that mandatory minimum sentences “do not appear to influence drug consumption or drug-related crime in any measurable way”. There was a second study from the department in 2005, where they said, “There is some indication that minimum sentences are not an effective sentencing tool”.
I would also point out that no witness, including the Minister of Justice, could provide any evidence to show that mandatory minimums worked; they couldn't produce the other side.
We did also get from the John Howard Society—because we asked them for this—the summaries of 17 studies from the U.S. and the U.K. on mandatory minimum sentencing, which came to the same conclusion, that they're ineffective.
So we actually have had information on this as a committee, but we've never had anything showing they worked—and we asked for it.