I will begin by saying that every country makes its own choices with respect to this. Some countries provide additional data that Canada does not provide at the moment, and some don't provide some of the data that Canada provides.
I think there is a variety of approaches, but I think the starting point really has to be how you define a tax expenditure. An important thing from Canada's perspective is that we.... Essentially, a tax expenditure is a deviation from the benchmark tax system, so how you define the benchmark tax system is very important for how you define the scope of expenditures on which you report. We take a very broad approach in Canada, which means that we report on a very wide selection of tax expenditures, and I think the OECD, in particular, has noted the breadth of the number of tax expenditures that we report.
I think it's fair to say that there are examples in other countries or other jurisdictions of data points that are provided—for example, more projections of revenues—but none of the jurisdictions provide all of those. What I'm saying is that they make particular choices.
We welcome the Auditor General's recommendation to provide more cost projections, and we've committed to providing an additional two years, where appropriate.
I think the challenge in that respect is the ability to project forward on tax expenditures. Some tax expenditures are related, for example, to business cycles or the market, and it's quite difficult and could be misleading to provide too long a projection of costs going forward. But we will try to provide as much as possible.