That brings me to the point I wanted to make.
Right now, the airports decide who gets time slots and boarding gates.
If I understand correctly, it's on a first-come, first-served basis. In other words, as long as a carrier is there and takes the spot, they get to keep it. The problem is, if a carrier is already occupying 60% or 70% of the space and says they want the next available space, it's hard to deny them if they are a big customer.