I'm not sure it's a fair description of how we're approaching it. Let me say that I think when you refer to the $15.5 billion and using GST/HST.... To be fair to the Auditor General's team, they were trying to come up with an estimate of how much might be out there, when there wasn't a lot of information available.
That's more of a projection of what's out there, rather than an approach. If we get to the projection, we think that GST data is not actually a very good indicator of who might be ineligible, and we have some experience with that. That's the issue of the estimate of the number. However, on the approach, ours is more of a risk-based approach.