Senators voted it down 23-30 on Wednesday.
The bill sponsored by state Sen. Daniel Biss and replicates part of a previous plan. It would require public employees to contribute 2 percent more toward retirements and push back the retirement age in increments by age group. The plan also requires the state to make its annual pension payment.
Illinois has nearly $100 billion in unfunded pension liability because for years lawmakers have either skipped or only made partial payments.
Opponents say the plan isn't constitutional.
Illinois has the worst pension problem nationwide.
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