Do you similarly decry the people who spend extra money at amusement parks to skip lines? Seems like exactly the same thing as this. You pay more: you get more.
By skipping the lines at amusement parks, those who don't pay extra have to wait even longer for their turn than they would if that system wasn't in place. So in effect, those who pay more benefit and simultaneously penalise those who do not.
If there was no fast pass system and people were saying "I'm rich, I'm entitled to a system where people like me get to the front of the queue," then yes, suck it up.
That's the whole point of the article; the rich must perceive that they'll get additional value (ie., no waiting in line) before they'll voluntarily agree to pay additional taxes.
Not quite. New elements are inserted at the end of the regular line, but at the head of the fast line. When you first enter the regular line, this doesn't matter, because everybody (fast line or regular line) would've gotten there before you in the regular line. However, every person that arrives in the fast line after you take your place in the regular line goes before you, yet would've gone after you if the fast line didn't exist.
Total waiting time is the same, but that's not the stat you care about. Your waiting time, as someone in the regular line, is. And that's increased by each person that arrives in the fast line while you are waiting. Their short waiting times are compensated by your long waiting times.