I have no issue with tipping people who do things for me that go above and beyond. I'm much less in favor of building tipping into interactions where it's customary and expected (especially when different parties will invariably have different ideas about what is customary and expected).

I hate how there are all sorts of random situations where I'm expected to tip. I've been told I'm supposed to tip at the car wash, when getting a tattoo, or using a food runner (do I tip the UPS driver?) - it's all senseless.and strikes me as a money grab against good natured folks.

The US can be really crazy. Part of the issue is that you have to understand compensation models--for example, my understanding is that like waiters, delivery drivers largely work for tips (usually). But, especially when traveling, there are a gazillion situations where a dollar here or a dollar there seems to be routinely expected sometimes. I suspect that I don't leave tips in some situations where many people do. (No, I don't routinely leave a few dollars a night for my hotel room servicing.)

No to UPS driver. Tattoo? No idea but probably given that I tip my barber.

In China, you're not expected to tip at restaurants, and you'll confuse people if you try.

You are, however, expected to tip your doctor before getting surgery.

I wonder if people would like tip-less systems more if they were allowed to rate the service on the receipt.

I personally don't see why rating the service is any of my business. If the service sucks, I don't go back. If the owner of the establishment wants to know why their business is tanking, they can do the same thing anyone else would do and keep an eye on things, making changes as necessary. Maybe their employees would do a better job if they were paid enough to respect it.

Works well in lots of places != sit down restaurants as per the article