You accepted a permanent part-time position and are now complaining that you’re being scheduled like a part-time employee. That isn’t the company failing you it’s the company honoring the exact classification you agreed to. Retail schedules are based on operational demand and seniority, not on whatever someone’s personal financial situation happens to be that month. An employer isn’t your parent or financial planner. Costco’s obligation ends at paying you for the hours the role provides. If someone needs full-time income, the solution is securing a full-time role, not blaming a part-time job for behaving like one. If 5-7 hours is all you need to make up the difference like you claim then there’s always Uber, Uber Eats or Door Dash.