I have an idea -- let's spend 60% of GDP on a "bad thoughts detector". Then we won't need to scan carry-ons and things like that, because ultimately it is bad thoughts that should be banned, not ultra-dangerous household objects like lighters.

I suggest dedicating 60% of GDP on this project because a bad thoughts detector is not something that even remotely exists at this point, and we do not have the luxury of time. Developing such a machine will be very expensive, but when it comes to safety in the air, costs be damned. The reason for the 60% figure rather than anything higher, such as 80%, is because government consumes 40% of GDP already, and we wouldn't want to impact any other government functions.