OK, I agree with your concern about the risk of states/cities going bankrupt. Its happening in Illinois now, and if Illinois goes like Greece, I can only imagine what will happen. Maybe New York City in the 70s is a guideline, but I digress...
BUT... even if you don't have debt on your house, you are still not risk-free. You could still lose it if gvmts jack up property taxes a bunch to try and pay for all the problems. It won't all come from income tax, especially on a city/county level. Separately, there is a risk that your nest egg could be devalued down to nothing caused by inflation. In the end, there is only so much you can do to protect yourself from all risks.
And of course, in the long run, we are all dead.
Yup. Very true. When you get down to the brass tacks renting is probably cheaper than owning when you factor in all the costs...Not many people will agree with that, but you rarely make money on a home investment. My brother is a pretty smart guy who has plenty of money and he's always rented...