Absolutely, that's a concern, yes. It's getting harder and harder to imagine the incentive for really smart, innovative researchers to want to stay in Canada, given the fact that we haven't seen an increase to their basic funding packages since 2003.
Anecdotally, I received a Canada graduate scholarship 10 years ago, and the value of that scholarship is the same as someone going to grad school today. Of course, over the last 10 years, we've seen a huge increase in the cost of living generally and perhaps most poignantly in tuition fees, which have outpaced increases to both housing and food.