It's definitely challenging once you start getting into capital purchases that are accrued over 10 or 20 years, as you said, in the sense that for most departmental spending, we have an idea three years out, say, and after that, it's my understanding—although I stand to be corrected—that Finance Canada is simply estimating based on some sort of standard growth multipliers. In reality, in terms of government spending, we could only really know probably three years out, so it is certainly challenging on these longer-term capital projects, and also in terms of reconciling cash versus accrual, when parliamentarians vote on these sorts of things.
I think what parliamentarians vote on should be what they get, but then again, there obviously can be changes over time. I don't know that purchase in detail, but there certainly can be challenges in terms of what the estimates are on capital purchases like that.