2. You claimed, in an earlier comment that:
"The aim of most publicly provided transportation is to assist in work-related commute. Unless enough of the population uses a plane to commute the plane is not a social necessity"
And I believe I have showed you wrong on this one. Please try again.
3. In general, people don't tend to believe they need their gun in an aircraft. But we aren't speaking of generalizations here. As you said: "A restriction of freedom is always for everyone." So yeah. And let's assume that paying someone to do it would mentally hurt some people even more. Now why should there be tax declarations if they might mentally hurt people?