I wasn't around back in 2000.
There was a review, I believe, in the late 1990s—and I may be getting my facts mixed up—where the government of the day was looking for cost savings. They looked at various crown pension plans that were under the PSPP, did a review, and made the decision to move it out from under the PSPP into the PBSA. There may have been some rationale, some consideration, given to the fact that mail services were not part of core government and therefore it should be spun off.