While I agree, I remember bartenders making $10/hr + tips when I worked in a restaurant... in 1998. I could make $10/hr washing dishes (always the most hard-to-staff position) but wouldn't do so until after the restaurant died down because I made more busing tables with tips.
Let's just call this type of employment what it is: wage slavery. People are used to there being a class of people willing to take these jobs.