Pensions - predictions - Public vs. Private

I have been complaining bitterly about the disparity between the public and private sectors long before pensions became a 'hot topic'.
Pensions are front and center because we have an aging population. In the next decade the ratio moves from 5:1 to 3:1. Moreover, pensions are relatively new in the scheme of policy, payment and procurement.
Public servant pensions are not sustainable.
I predict that in the next 12 - 15 years there is going to be a class war between the private sector and the public sector based on the simple issue of those who have and those who have not. The fat cats being the bureaucrats! When the Canada Pension Plan was created the average life expectancy was 67 now average life expectancy is 82. How is it sustainable to pay a pension to public servants who retire at 55?