[kortilla]

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.

[catminou]

Canada already has a usage fee for using ATC services fwiw. Based upon type / weight and distance traveled you get charged per flight.

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.