Miller, D-Calvert, testified Wednesday that change is needed to save Maryland from "a fiscal tsunami" of steeply rising pension costs.
Five years ago, Miller said, the total teacher pension cost was $475 million. This year, it's $978 million.
Maryland is one of the few states in the nation where the state picks up the entire cost of teacher pensions.
The senate president, who is sponsoring the bill, said the current system is simply unsustainable.