In Canada's Parliament: Tax Haven Question - But Not Much of an Answer

The Canada Revenue Agency may be one of the government's largest departments but does it have a handle on how much money goes offshore before it can be be subject to tax?   Hundreds of billions aren't subject to even the lowest tax rate. 

The new Official Opposition Critic for Revenue Murray Rankin, put the question to the Revenue Minister.  

You'll have to decide if the answer is satisfactory.