Harvard has particularly expensive food service staff:
Last year, Harvard food workers that were making an average of $22 per hour went on strike asking for a higher wage, lower health care costs, and a $35K per year total compensation for anyone who “wants to work the full year”, even if they don’t do so. In the end, the administration caved to the striking workers demands.
I know a few professors there and they said they got by just fine without the dining workers. But they apparently had some student support, and in the end the administration caved.