I don't know Kaiser's financial standing but whatever it is, if you plan a pension, bear in mind markets change. Even if Kaiser is flying high now (I don't know if it is) it could flunk 10 years down the road.
Kaiser does seem big. Still I wouldn't have much faith in them keeping a pension going on for over 2 decades is a risk.
State and federal pensions are safer. Even when states budgets have gone bonkers, they still honored pensions and were even willing to let dangerous criminals out in the streets before pensions were cut. Never in history do I know of any state or the fed not honoring a pension. City pensions, however, I've seen some cities not be able to pay them.