We've been scammed.  
After reading the Annual Financial Report of the Government of Canada I couldn't figure out how the PBO assumed that the Federal Government budge was sustainable.  And then I found it.  The PBO (along with Trudeau) included the assets of all public pension plans (including CPP) as government assets.  Sorry, but these are not assets of the government, they belong to the people covered by the pension plans and cannot be used by the federal government.  They should not be included
My analysis shows that after Harper put us into a structural surplus Trudeau put us into a structural deficit.  Between 2015-16 and 2016-17 government revenues fell while expenses soared.  Clearly, if revenues are falling and expenditures are rising during periods of economic growth, what sort of mess will Canada be in during the next recession, and there will be one?  
This looks like the 1970s all over again.