http://www.forbes.com/sites/econostats/2014/11/10/a-better-solution-for-munis-on-the-brink-of-bankruptcy/

Give workers the option of cashing out their pro rata share of pension assets and putting the money into something else. But the IRS has to bless that.

Comment: Therein lies the seeds to one possible solution to Illinois’ constitutional issue. Give that option and continue to underfund the pension, making the rational choice obvious.