Check out the post under the 'electoral reform' thread, some of your questions were answered there.
True, the executive in theory is answerable to the parliament as it should be. In actual fact it is not in Canada, power has shifted to the executive since the PMO controls the majority of voting in the house. Parliament no longer has any power.
For the record we do not advocate abolishing parliament.
By asking this question we are suggesting to those who see no need for political reform and who think that parliament is working just 'fine' are;
advocating 'a small ruling class' elected once every few years or so,
that the people (via their reps in parliament) have no right to say ‘no’ to the government,
and that abolishment of the legislature is a logical next step.
We can't promote ourselves in this forum, but google our name and read our policy sections (enjoy yourself), come back and let us know your thoughts.