But wait, it gets worse. The graph we showed earlier stated that unfunded pension liabilities for state and local governments was $2 trillion. But that assumes an average 7% compound return. What if we assume 4% compound returns? Now the admitted unfunded pension liability is $4 trillion. But what if we have a recession and the stock market goes down by the past average of more than 40%? Now you have an unfunded liability in the range of $7–8 trillion.
Source: Pension Storm Coming: "This Will Become One Of The Most Heated Battles Of My Lifetime"