I think the main challenge is around uncertainty. Our tax system resides on a retroactivity aspect. With retroactivity to 12 years, one major problem that we identified when we came forward on Bill C-48 was the fact that taxpayers lose the right to appeal if the measure has not been legislated, yet they still had to conform to the measure. That's the kind of legislative uncertainty that we need to eliminate from the system.
On May 8th, 2014. See this statement in context.