Careful on the assumptions there. How much a tipped-wage worker goes home with can vary from east side to west side of a town, much less different parts of the country. I worked at a corporate place and made less than $9.
So if you are getting 3 an hour to start and receive only 10% tips you would be selling $60 worth of food an hour. Corporate places like this don't have servers selling only $60 an hour on average because if they can't do better then that the store gets shut down. So tell me about the corporate restaurant that you made 10% tips and sold less then $60 dollars an hour. It certainly wasn't a TGI Fridays, Chili's or Applebees cause I know how those places are run.
No it wasn't any of those three places. I was selling over $60, probably more like $150 an hour around rush, but you realize servers aren't the only step in the process, and most places share wages. Also, people don't always tip at all. This was a big problem where I worked. We were number one in the state on server friendliness, helpfulness, etc, but I was still going home with about $3 a night atop state minimum wage. That's after an 8 hour shift.
I don't know what kind of restaurant you were working at, but it certainly wan't an Applebees. Yea I realize that servers aren't the only people getting a cut of those tips, I have about twenty years in the service industry. I spent about four soul crushing years FOH/BOH/trainer/occasional new store opener, in multiple states at a restaurant along Applebees lines. It wasn't the best money, but it wasn't bad, it certainly was more then ten dollars and hour. This girl is either full of shit on the nine dollars an hour or she was a horrible server. I don't know what kind of place you had stealing your money and calling itself your job, but it certainly wasn't a painfully efficient well run operations like an Applebees.