The Criminal Code has always been modelled on a system of maximum sentences, not minimum. The Canadian Bar Association doesn't generally take issue with that model because identifying the maximum sentence in relation to a particular crime is an indication of Parliament's views as to the seriousness of an offence. A sentence may be six months, 18 months, two years, five years, 10 years, or 14 years. The maximum sentence is a sign from Parliament as to what level of moral culpability we generally would find associated, at the highest level, with that offence. It doesn't tie the hands of judges at all, but it does send the message that you talked about to those people within the justice system, and it's a message Parliament certainly must send, because it's their job to do so.
On December 7th, 2009. See this statement in context.