So as I understand it, every sever in the US makes state minimum wage a) lower wage + tips to take it to minimum or, b) if tips don't make it up to minimum the restaurant must make it up. No one in a restaurant is making less than in the Walmart across the street despite the protests that you must tip to give them a living wage. I have never tipped a grocery store worker, or the cleaner who cleans the loos at the mall. Why is one expected and the others not?

In some states, such as California, severs make full minimum plus any tips. So when I visit there, should I tip less?

In ON, servers get full minimum wage, and their tips, and many get things like healthcare. Same as CA? Same as NY? Or just use Canadian Tire money?