We have the experience, though, in New Brunswick.
At some point, there was an election where all political parties promised to have pay equity legislation for all of the public sector, and I believe, even for the private sector, but when the Liberal government of the time, which was that of Mr. McKenna, came in, he adopted legislation for only one part of the civil service. Those workers in those departments were part I workers. That didn't include education, hospitals or health, or crown corporations. They were supposed to add other groups afterwards and didn't. It stayed like that from 1989 to 2009.
Phased-in approaches are sometimes another way to delay pay equity, so I would be very worried about that.