To be very short, I would echo what Dr. Haggie has said. I agree with what he said. I just have one thing I would add.
You mentioned New Zealand. One of the things in New Zealand is that they have an agency that covers the entire country, which is not the way it is in Canada because we have our silos with our provinces. When I asked them about drug shortages, they said it was a problem. I forget the name of the agency, but they addressed it, found an alternative source, and the problem went away.
So talking to colleagues from other countries, they have less of a problem than we seem to have in North America. The question of why that is, as Dr. Haggie said, I don't know, and I turn to you to find out why.