Weeks after an announced increase in state funding staved off a tuition hike, the Board of Regents riled spending critics this summer by handing 3% raises to some of UC’s highest-paid employees. The number of those making at least $500,000 annually grew by 14% in the last year, to 445, and the system’s administrative ranks have swelled by 60% over the last decade — far outpacing tenure-track faculty.