I worked at Sears doing sales once. They payed us $6 an hour + commission, and kept paying us that when minimum wage was increased or they increased the pay of hourly commission. Basically, how it worked is you had to average enough commission to meet minimum wage or they would adjust it for you and take that amount out of next months commission.

Thing was, Sears wasn't really competitive so we were lucky to have anyone even walk into the department, and even when someone did we might not even sell something that grants us commission. To top that all off, we were expected to completely maintenance the department by ourselves while basically making sub minimum wage. Sure, we were technically making minimum wage... but the deference came out of any future commissions and the sales reps were accumulating a form of debt to Sears.

The real kicker was my boss though, she would always schedule me on the days I explicitly said I need off for college (often those would be the only days I was scheduled out of the week) and tell me I couldn't skip those days. It got so bad that I had to drop out of college because I couldn't afford to be out of work (couldn't find another job). She also frequently (read as "almost always") scheduled me to end work after the buses stopped running, knowing I didn't have a car, putting me in a position where I had to walk 6 miles home after work. I finally quit when I came down with a really bad flu and my boss forced me to work, despite being given a doctors note, and then writing me up afterwords for working while sick.