Which state plan is likely to be the second to go pay-as-you go (the Minnesota Legislators Retirement Fund is already there)?
You can compare Funded Ratios (here) but the Accrued Liability values in the actuarial reports are not to be trusted. A better metric, less susceptible to manipulation, is the Depletion Ratio:
(Payouts – Deposits) / Market Value of Assets
Of the 154 plans in our study, 131 have negative Depletion Ratios with one state (not Illinois) having 5 of the 13 plans with the worst Depletion Ratios: