The issue isn't the returns earned on investment by CPP.  The issue is the unrealistic payout expectations from a lot of people - not to mention the politicians of a certain stripe who like to promote the idea that government can do everything simply by using more of other people's money.

After a number of years of instability CPP was revamped into a fairly steady and stable entity.  Expanded CPP without realistic costing in place and transparency around funding is the real threat.

But as you say - those that do the most to look after themselves will again be called upon to provide the entitlements to the entitled.