Yes, I will concede that my estimate of $67K per year in earnings is probably high.
But your assertion that "most waitresses have a base below federal minimum of $7.25/hr." is likely false.
Take a look at the graphic that Cathy63 posted
www.dol.gov
It would be accurate to say that most states have waitress wages below the federal minimum. But most waitresses by sheer numbers? Unknown, for sure because with California, New York, Florida, Illinois, Pennsylvania, New Jersey among those states with wages above the federal minimum it's not for certain that most waitresses make less than base of $7.25.