They could but the vendors pay big $$$ for the contracts so the university would lose a bunch of outside $$$. There are plenty of workers available. The problem is that employees are driving the market at the moment as workers are leaving other jobs at a record pace. That in turn is driving up wages as employers are scrambling to fill vacancies. Food and Service industries are struggling the most. We have to bring back manufacturing so that low skilled workers have opportunities or we will continue to see the food service/retail industries demand raises more frequently as often those who are employed in food/service retail have few options. It's also why there's so many unhappy workers. These low pay jobs should be filled by high school students getting their first job and retirees trying to stay busy not people trying to make a living. But many low income, low skill workers have no other jobs to turn to.