Cough up a buck, you cheap bastard. I paid for breakfast.

Americans are tipping literal ATMs. It's out of hand. The employer should be paying the salary of the servers - unless you are living in some kind of failed socialist state?

Should we tip the robots too?

Only if they really put forth an effort.

In a way, that's somewhat my point.

The tip isn't the problem, the expectation that the tip will occur and thus salaries can be lowered as a result of it - is.