The number of individuals necessary for the CRA to administer specific tax measures is not something we have looked at. However, I have to say I'm a bit surprised to hear that CRA officials did not know that, because in my experience there is usually quite a bit of back and forth between the Department of Finance and the CRA on the administration of tax measures that are proposed for inclusion in the budget to ensure that, in fact, the CRA can indeed administer measures that are considered for inclusion in budgets or estimates.
On April 18th, 2024. See this statement in context.