It's my understanding that the Federal Sustainable Development Act provides an overview of how we're doing, whether we are moving towards a more sustainable future, while Environment Canada and other agencies such as Agriculture Canada have legislated mandates and targets that they have to deliver on.
I've noticed in my review of U.S. laws that it's a common practice to give environmental officials specific timelines for issuing regulations and for reporting on regulatory compliance. Based on what your report showed about the lack of commitment to monitor, verify, or even enforce laws, I wonder if it might be useful to move to a more accountable system in our legislation.