It's how the world of food service works. As a pretty 23 year old with big breasts I get more tips than my older or younger coworkers. But on the other hand, I do rake in tips for them too, seeing how we share the tips. I spend a lot of time looking my best for my shift, collect the tips and share it with my coworkers. Everybody wins.
Now, if I would keep all the money to myself, that wouldn't be fair.