Agree that debt is a HUGE problem going forward, but public pensions are just one part of the problem. They are dwarfed by other types of debt.
BTW, nobody in their right mind would use the market value of of assets discounted by the 15-year Treasury rate, especially during a time of unprecedented Federal Reserve manipulations. This was put out by a right-wing group that is 100% funded by those behind the Privatization Movement. In other words, pure propaganda.
There is a very real war going on against working/middle-class people in developed countries. Don’t be a a useful idiot. If you’re not being paid, you should definitely demand payment from the Privatization Movement for your services. They expect to reap great rewards from the work of people like yourself; make sure to get your piece of the pie.