When the chief actuary assessed the cost of the initial child-rearing dropout in the CPP, the cost was found to be very modest. It was 0.1% by 2000 and 0.3% by 2025, or something like that. You can find that actuarial report from just after 1977, when the first dropout was added.
We asked former chief actuary Bernard Dussault for his opinion, and he did a back-of-the-envelope calculation based on those numbers that would suggest the cost of adding the child-rearing dropout to the enhanced benefit would be even more modest than that going forward.
Given that we now have the chief actuary's 28th actuarial report on the CPP, and it confirms that the legislated additional contribution rates to support the enhanced benefit are sufficient to fund that benefit over the long term and that there's a bit of wriggle room in what's possible, we think it is very likely possible to reintroduce or extend that child-rearing dropout to the enhanced benefit within the cushion and the room that exists. I think that's something the office of the chief actuary will have to undertake, though.