You don’t have to worry about not getting enough hours; there’s always work to do.
The workload for part-timers keeps increasing. One person is expected to do the work of three or four people, so people keep resigning. Those who stay have an even heavier workload, creating a vicious cycle. Part-time positions are treated like full-time ones, with full responsibility expected of part-timers. Staff turnover is too high, and the company does not value its employees.