This column and most comments ignore important aspects of reality. First - to compare Canada to Greece is irrelevant to Canada's situation. Greece's debt to gdp ratio is 175%. Ours is 65% combined federal-provincial according to the Fraser Institute, for 2015-16. It's very misleading for Konrad to toss out the loony comparison of Canada to Greece. Shame on him.
This article fails to take into account very low interest rates and consequently very low costs to carry debt. For a more rational assessment of Canada's reality, see Kevin Milligan's article in MacLeans March 28 2016: We Are Not Heading to Fiscal Crisis .  This shows that federal deficits are 1.5% of GDP  compared with 5% in the mid-1990's.  He assesses future scenarios rationally. 
This era of low interest rates is a good time to invest in infrastructure and other long term projects. The debt is long term - often 20 to 30 years, so there is no danger of a sudden increase in carrying costs when interest rates start to rise.