Same fee for every aircraft. Increase until the congestion reduces. This is called a congestion tax, it works.
No need to distinguish between purpose of the flight. If it’s economically important, they will pay.
No need to distinguish between purpose of the flight. If it’s economically important, they will pay.
Same thing could be used here - not sure it's going to fix some of the fundamental issues of lack of staff and poor FAA management.