Every airport operator should have a system of continuous auction for approach slots. All ailines*, high cost as well as low cost, have a continuous auction for sale of their product. This continuous auction idea(of which I fully approve) should be extended to the other end e.g. carriage of lifejackets, provision of crash fire service, gate slots(already sort of done) take-off slots, everything.
As well as the auction system airport operators should have a levy against aircraft declaring fuel emergency. This levy going to FULLY compensate the preceding bid queue for total extra cost. With my suggested system in place I think the ailines might change their fuel policies slightly.
*Originally a typo but I quite like it. Maybe for use with only certain airlines.
