> Some city or state is going to go bankrupt because of this,
States cannot go bankrupt, without a change to federal law. Cities can and have, and pensions have already been addressed in that context. It's not a new question.
> and the people affected are going to sue. It will take at least a decade to work up to the Supreme Court, who will find (no matter WHAT the liberal/conservative makeup at the time) that, surprise, surprise, the government is NOT legally obligated to pay out the benefits they said they would.
It's already been established that pensions can be cut in bankruptcy, so, yeah, that's not even a question.
> Various governments will try to implement various forms of austerity to make it work,
They already are to prevent running into the major crises (e.g., recent pension funding requirements reforms in California.)
> Don't worry though. This exact same thing is also happening to Social Security, which will crash around the same time, or shortly after, so everyone working now will get the shaft.
Social Security won't crash; even with scenarios projecting Trust Fund exhaustion it still ends up paying at worst something like 2/3 of eligible benefits out or current revenues out to the limit of projections.