It's been shown that the wealthiest individuals are the worst tippers. I don't feel sorry for investment bankers that now have to pay $115 for their lobster versus $112.
My first part-time job in 1965 paid minimum wage of $1.25 an hour. And you could actually almost live on that. Even in college, tuition was about $135 a semester at the university and books were $50 or $60.
Equivalent today would be around $10.30 and you can barely buy lunch at McDonalds with that amount.
So, excuse me if I don't mind seeing people paid $15 an hour.