As I've said, despite not being a panacea, it is a very legitimate policy question for parliamentarians to consider, whether to add a special advocate. But I would suggest that this is a policy issue for parliamentarians, and it is not one for an official to answer at this point.
What I can tell you is what the current law is, and I certainly agree with you that part of the interest of the state is to ensure that democratic values and values of respect for the rule of law are seen in the procedures that exist in Canada. To that extent, the certificate process is an attempt to achieve that balance.
But there may be better ways to achieve that balance. Again I say that at the end of the day, this is a policy issue for parliamentarians, whether to change the current law that we have.