As regards the public investment that was made in airports, when that asset was turned over to airport authorities across the country, off the top of my head, I would guess that the book value they estimated was $1.9 billion. The airport rent that has been collected since those assets were divested by the federal government has far exceeded that. One could quite easily make the mathematical argument that this asset has already been paid for by the Canadian taxpayer and our passengers.
As regards Nav Canada and the air traveller security charge, certainly there has to be some element of user-pay. We appreciate that this infrastructure can't be supported ad infinitum by the government, but there are other models out there that allow that to be done in a more economical way.