Greg,
That's pretty awful.
I mean, where your weekly take-home pay is based upon the gratuity you get from customers, not from your actual boss, seems a bit on the nose.
Is there a minimum wage in the US?
Sure, if you have a very minimum skill-set (like you left school with little or no qualifications), you aren't going to get paid that well.
However, I just feel that a lot of the employers (particularly in the hospo industry), use this tipping system so that they don't have to give an extra cent to the people that actually help their business run.