There will be many questions that are truly within the realm of parliamentarians to decide. Some of those can be informed by economic or budgetary analysis, and others cannot.
If you take the case of the Iran war, let's go back to the start of the parliamentary budget office in 2008, when one of the questions of the day was whether the government should insert itself into the conflict in Afghanistan. At the time, the government was saying that the cost of that would be in the order of $8 billion or $9 billion, and the Parliamentary Budget Officer of the day, Kevin Page, said it was up to Parliament to decide whether to engage our military in this conflict. He said that, respectfully, our analysis was that the cost would be much more like $19 billion or $20 billion dollars.
That is a good example of the type of question where elements of a decision like that, the diplomatic or military considerations, are not appropriate for a PBO to weigh in on. However, if there are big questions where there should be attention paid to whether the government's estimates are correct, or whether there would be unintended consequences or whether there are risks that the government either hasn't foreseen or hasn't been transparent about, the PBO can absolutely be a support to parliamentarians for those types of questions that are going to come with the very uncertain and volatile world that faces Canada.