I agree with Mmm_Donuts and others here that we should not necessarily be banking on these for our future retirements.
My best guesses/assumptions:
CPP – Fiscally sound and is in no danger, but we will likely be asked to put more towards this in the coming decades due to poor personal savings rates and disappearing pensions for private sector workers. This will mean fewer dollars during your working life to invest as you see fit (or blow at the Casino). Overall, good for the country as a whole, but not necessarily great for do-it-yourself types, or widows.
OAS – As the Boomers come through we will see this pushed further back and possibly reduced in size/generosity by the time we are there (30 years from now)
GIS – will stay in some form
Healthcare/Taxes – The cost of supporting the Boomers during their final years (most taxing on the health care system) and in nursing care will see an increase of taxes and lowering of support for the groups that come immediately after.
Personally, both my mother and father (separated) rely heavily on CPP/OAS/GIS. I wish it wasn’t so, but this is their reality. My in-laws have a paid-off home and a small amount of savings, but they too will be relying significantly on these programs.
Unless we significantly increase quality immigration, greatly reduce government debt, and find ways of massively diversifying our economy, I see lean years ahead for my generation. As the bulge in population heads to the exits, and those of us left are left working in a much more precarious workplace, I do wonder how we will continue to fund even what we have now.
I suppose negative interest rates might help … I hear they are the new solution.