We in Germany still pay a tax on sparkling wine that was introduced in 1902 to finance the imperial navy.
A lot of taxes are sold to the population as temporary, then people get used to it, normalize it, and even forget it was supposed to be temporary.
Just like the fees on the turnpike were meant only to pay back construction costs.
Most temporary things end up this way.
Baggage fees aren't really because of 9/11, at least not directly. It's more because of competition from budget airlines and downright greed from major ones. First the budget airlines started billing stuff separately so people could save money by only buying what the needed. Eventually bigger companies started doing the same, BUT without actually lowering the prices on the tickets.
Remember Americans, income tax was supposed to be temporary too.
well in italy we are still paying taxes on fuel to make up Suez crysis of 1956. So yeah, shit happens.
Still haven't seen a bouncing plane.