I really don't know the numbers. We're not in a position to be able to do that calculation. But certainly the justification provided by the CRA for that number sounds reasonable.
It's likely to be even more expensive than that, given that projects don't always go as anticipated. Additional costs arise during the project. If we're introducing new complicated IT systems, that hasn't always gone smoothly at either the provincial or federal government levels. A lot of risk is associated with changing something that actually works.
Let's face it. Our tax system works. It's just more complicated for those living in Quebec. As I said, that could easily be solved by centralizing the administration with the CRA, which already has all the systems and processes in place, and all the expert knowledge and auditors able to do that, as they do for other provinces.