Certainly there are a couple of points.
With the CPP, there are, of course, joint federal, provincial, and territorial consultations. So the two orders of government are in discussion about that and have to be in agreement.
With respect to the relations between federal programs and provincial and territorial programs, nationally we have OAS and GIS in place and the provinces are well aware of those programs. The GIS does have a clawback rate, as it's targeted at very low-income people. As your income rises from other sources, you get less and less GIS.
The extent to which the provinces tailor their programs around that clawback is hard for me to say. It's up to individual provinces. Some will build on that. An example would be Ontario, which has a GIS-like program of its own, a supplement to the GIS. I can't speak specifically on what Quebec does or how they take into account those clawbacks.