I always remember when I was working in a restaurant aged 16 there was one chap who would always demand a "bonus" for coming in at short notice to cover someone

I always remember when I was working in a restaurant aged 16 there was one chap who would always demand a "bonus" for coming in at short notice to cover someone's shift. The rest of us would typically have just said ye or nay depending on whether we were free and wanted the cash. He was a crap awful waiter and no-one was best pleased to find out he was getting more money just for showing up. Wasn't enough for us to change our behaviour though... haggling for money is just so undignified