I do not see that. The treaties are designed to avoid double taxation. They're basically focused on foreigners investing in Canada as opposed to Canadian companies investing abroad.
I do know enough about Canadian taxation to know that you have a greater degree of connection between your treaty program and your domestic law. I believe, if you have treaties in place, you allow subsidiaries of Canadian corporations to repatriate funds free of tax.
That's lacking in our system. In our system, the treaties are completely separate. From a U.S. perspective, a treaty basically does not help a U.S. multinational avoid anything. What's helping them is our domestic law.