One of the few rights that cannot be arbitrarily subjected to the notwithstanding clause of the Charter of Rights and Freedoms is the right to vote.

This is designed so that even if the government is tyrannical, the ultimate legitimacy of government fundamentally lies with the electorate.

One of the reasons the PM can be found guilty of violating the law numerous times and remain still in power is because he is for practical purposes beyond prosecution. Our system of government fundamentally relies on the checks and balance of an informed electorate that practices its duty to the country faithfully. Of course the courts are an important part as well, but the system is totally reliant on the electorate to hold parliament accountable for parliament's appointment of justices.