At some point in the future, I sense that a considerable number of "public pensioners" from various states, cities, and counties are going to find their benefits cut, with little more than "take it or leave it" as a recourse...
That's correct. The private pension system has fared much better than public sector pensions, the difference being ERISA. Not only are private employers required to adhere to funding standards, they can also can be far more proactive in freezing their pension plans and switching to options with more cost certainty.
In some states, government plan sponsors cannot abrogate the "promise" made to the employee at time of hire - if he was promised a pension plan, that can't be taken away.
The ultimate solution will likely be a form of reorganization-type bankruptcy, where pensioners will have to take haircuts on the benefits they were promised.