I actually don't think they're ignoring them; I just don't think they have the same capacity to address international taxes that they do to address local taxes.
I don't want to reiterate what those drawbacks are again, but certainly employees at the Canada Revenue Agency are up against, as I said, tax giants. These are people who have immense skill, technology, expertise and other big companies on their side. The CRA needs to be on a level playing field.