I find much to agree with in Mr. potter’s article but find the apparent absence of mention of MP’s fiscal probity odd to say the least. That is, after all, the subject driving the current news cycle on ethics. 
If advising MP’s on conflicts of interest is niether valuable nor within the Ethics Commisioners mandate then who will be entrusted with that task? MP’s, including the PM, themselves? That is no less than the fox guarding the hen house.
If one wishes to tear down an institution then it is encumbant upon them to suggest an alternative, is it not?