It's clear none of you have the remotest grasp of the economics which keep an airport running...
Suffice to say, without public subsidy, having GA paying peanuts at a big airport makes sense only to the GA pilot and his passengers
You are correct.
Needless to say, I do not believe JFK Intl. or their FBOs bills our government $1,000+ (in the same way as Stansted, a considerably smaller airport, charges around 500 pounds) every time I land and park my Cessna overnight there.
It just wouldn't be allowed.