By Bay City News Service: University of California President Janet Napolitano's office called this week for a plan that would increase students' tuition by as much as 5 percent over the next five years unless the state provides comparable funding, a move that critics blasted as taking university students hostage. After years of steep hikes, the UC system froze tuition for the last two years, and upon taking office last year, Napolitano pledged the tuition freeze would remain in effect for the 2014-15 school year.