This past week, more than 2,000 mental health workers for the HMO health care giant Kaiser Permanente in California went on strike. The strike was organized by the National Union of Healthcare Workers. The union says Kaiser Permanente patients have been the victims of "chronic failure to provide its members with timely, quality mental health care." On Thursday, about 150 Kaiser Permanente employees picketed the Woodland Hills Medical Center in the San Fernando Valley. One of them was therapist Deborah Silverman. In her eyes, the biggest problem at Kaiser right now is understaffing.