well they need it to operate the economy in the way that it has been operated as of late. which is to say: maybe if we take that away from them, we could solve two problems at once? Pollution from air travel, and all the societal problems that a globalized economy without meaningfully global regulation brings?
If it’s the case that international air travel makes companies more competitive, all you’ll really be able to do is to further stratify the winners from the rest of the pack by sharply increasing the cost of air travel.