Gov. Jerry Brown unveiled what he called a “radical change” in the pension system for public employees, even though the plan fell short on some of the most significant goals of the governor’s original proposal.

Speaking to reporters in Los Angeles, Brown said the tweaks he and legislative Democrats have agreed to in principle would save the state from $18 billion to $30 billion over the next 30 years. Though he provided no details on where the savings would come from, Brown said his finance department would produce those numbers shortly.

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