Keep in mind the retail person getting paid minimum wage doesn't determine bathroom policy. I worked at a retail store that had a no public policy, and if we wanted to use the bathroom we had to get the key from the manager on shift. I was yelled at by customers all the time because they couldn't use the bathroom. Guy told me he was going to figure out which was my car and take a shit on the windshield. One guy pissed on the front door, which we had to clean. Someone lifted up her shirt and showed me a massive scar over her stomach and said she HAD TO GO. I still had to say no. I fucking hated that job.