We work mainly with the provincial and federal Departments of Finance. The Canada Pension Plan is jointly administered with the provinces. Changes to the CPP require the support of two-thirds of the provinces and two-thirds of the population. We talk with the provincial finance ministers and our department "delivers the goods".
Evidence of meeting #32 for Status of Women in the 40th Parliament, 2nd Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was cpp.
A recording is available from Parliament.