Jim Bennett has a great post about the perils of importing institutions:
One could take that point further. Canada’s constitution now combines the British parliamentary system’s stong prime ministership, which with a well-disciplined majority can pretty much push through whatever legislation it wants, with an American-style supreme court with very strong powers. Rather than serving as a check upon each other, they seem to act together in creating a ratchet toward a single set of solutions for any problem — more interventions by the federal state, no matter how ineffective or obnoxious previous ones have been. Either the historical British system, or the historical American one, have been more effective in balancing government actions with freedom and an effective civil society. The Canadian hybrid seems to have imported the vices of both with the virtues of neither.