I haven't done the technical modelling, but if you do it at a high enough level, and you do it deductively.... I think the projection was that if you didn't do anything with respect to OAS, it would go from 2.5% of GDP to 3.3% of GDP. If you make these changes, obviously you're going to do less. The only point I'd make, again, is that moving the age is essential. I focus more on the fact that we need to have more people in the labour force 20 years from now because of what's happening to demographics. That's the way I look at it.
The question around fiscal sustainability is this math around how much we want to spend on these things and how we allocate to various groups.