Essentially, when companies refuse to collect sales tax for technological reasons, for example, we must not be naive. If there are driverless cars in Los Angeles, we can certainly collect sales tax.
It will of course require international coordination. I would be very pleased to see Canada engage more proactively in the consensus that is slowly forming. You might think I am being utopian, but ultimately we can get there, either by going through a crisis or by being visionary. I would rather see Canada engaged with countries such as France and Germany. Australia has already given a lot of thought to this as well. I think coordination is beginning on these issues.