Is the ethics commissioner enough?

In regards to the matter of Nigel Wright and Mike Duffy, the Canadian Press considers the limitations of the ethics commissioner.

The Harper government has deferred to the commissioner as a part of the remedy in this case, the implicit message being, don’t worry, the ethics commissioner (and the Senate’s internal economy committee and the Senate ethics officer) will sort this all out. And so the ethics commissioner’s mandate and power must be considered: Is an investigation by the commissioner going to be sufficient here? And should the House of Commons merely wait to see what the commissioner’s work accomplishes?