The scenario being faced is not a complete cession of the existence of jet fuel, it is a supply shortage. There is a split based on pre-existing contractual obligations: absent such obligations, who offers the most money, gets the fuel; But those who have pre-existing contractual obligations they find cannot be met, they default on those obligations.
Rationing can be useful when a government decides the market is allocating contrary to the national best interest, for whatever reason. As with market pricing, it's not going to magic new resources out of nowhere.
