Peter H Russel raises an important question in his recent article on the Globe and Mail. However, I don't think the issue was explored deeply enough.
The claim of "Parliamentary Sovereignty" has deeper implications.
It implies that anything short of the constitution, or even the constitution itself, can simply be modified by elected government as deemed fit. Of course, attempting to change the constitution without following the expected process would cause fits -- but what is the constitution other than a special law with very strict requirements on form and procedure?
Now, don't get me wrong. I'm not claiming anything about our current government! However, who knows what type of party may be in power 20 years from now. Give them carte blanche and who knows what kind of damage could be done by removing one of the few available checks on government activity.
Whether you lean right or left, whether you like the current government or not, keep in mind that we all need to limit the powers of government and ensure that we don't inadvertently erode whatever minor limitations in power might currently exist.