Topeka ? Kansas legislators have learned that Republican Gov. Sam Brownback’s proposals for reducing the state’s annual payments for public pensions would increase long-term costs by $3.7 billion.

The House Appropriations Committee received a briefing Tuesday about Brownback’s proposal to extend the time for closing a long-term funding gap for the Kansas Public Employees Retirement System.

A 2012 law commits the state to increasing payments to KPERS to eliminate a $9.8 billion shortfall in the pension system by 2033. Brownback wants the payoff date to be 2043 to lower the state’s annual costs.

He’s also proposing to issue $1.5 billion in bonds to give KPERS an infusion of funds.

But the changes would require larger-than-planned contributions to KPERS after 2032. Some lawmakers said they’re concerned about the higher long-term costs.