Earlier quoted context omitted.
Tipping has been abused by employers to allow them to pay less than a living wage. People who refuse to tip are trying to prevent this abuse. Asking for employees to get a fair wage for the work they do should not be dismaying.
I'm not saying they shouldn't get a living wage before tips, they should. In fact, if we got rid of the minimum wage exceptions for servers, we would immediately revert tipping to what it was intended to be, incentive for good service. What's dismaying is how many people in this thread don't even want to have to think about how the person driving them is a human being, often just trying to make ends meet.
The problem is, this argument could be applied to all minimum wage workers.
Should I tip the cashier at McDonald's or Wal-mart? They're not making a living wage and are probably struggling to make ends meet. How about the guy that pumps my gas (I live in Oregon where it is generally illegal to pump your own gas)?
And that's what really gets me about our tipping culture in the USA. We're so inconsistent about who we think we should tip. It's completely arbitrary.