Also, the workers didn't promise themselves anything. They made a deal with their employers. The employers didn't have to agree to anything. They did, and those deals should be honored.
The employees getting the pensions are not the same ones doing the negotiating. By your theory, government employees would always get what they wanted and therefore never strike, but that's demonstrably not the ase.
It's funny, when a bank NINJA-loans a half-million dollars for a 1000ft^2 bungalow, it's always the-purchaser-took-advantage-of-the-bank, and never, the-bank-should-have-known-better-and-deserves-to-go-broke.
Any one know what kinds of perks Michigan as for state munis? In colorado you get a tax break on them.
Banks deserve to be exposed to the risk they assume in general, but this issue has problems in addition to the problem of banks being sheltered from risk.