WTF are you talking about? Do you even know what "supply side economics" is?
It's become quite apparent that you don't.
Do you know what apparent means? What exactly is your point here?
A tax sunsets and one day later the price of an airline ticket (at a handful of airlines) is the same. According to you this is proof that supply side economics don't work. You don't make any sense, sorry.
Even if this article was related to "supply side economics", the author admits that other airlines lowered prices in parity with the reduced taxes. Which sort of defuses whatever point you thought you had.
What do you want from me?