If you scroll down the Calpensions article, hiding towards the bottom you will find:
...Last January Gov. Brown proposed a long-term plan to cut costs. State worker retiree health care would be shifted from “pay-as-you-go” funding, which only pays the health insurance premiums each year, to pension-like “prefunding” that invests additional money to earn interest. State workers would contribute half of the normal cost of the plan, work longer to qualify for full retiree health care, receive a subsidy no higher than active workers, have the option of a lower-cost health plan, and face tighter dependent eligibility and Medicare switch reviews. The plan must be bargained with unions. An incentive for unions might be that agreeing to the plan would strengthen the “vested right” to retiree health care, which some think may not have the legal protection currently given to pensions...
The text, in short, seems to have semi-hidden meaning that is easy to miss: