“At the root of the problem is the incentive system that elected officials used to face. For decades, across the US, local leaders ran up tabs for future taxpayers; they promised pensions and other benefits for public employees that have strong legal protection. That has been a great source of patronage for elected officials: they can promise all sorts of future perks to loyal supporters with very little accountability on the delivery of those promises.[…] Leaders across the country cannot continue as they have. They must choose sides because there is simply not enough money to go around. Will they side with taxpayers, unions or the municipal bondholders?”
http://www.economicpolicyjournal.com/2013/07/meredith-whitney-detroit-will-start.html