Perhaps they should also then subsidise your local plumber and butcher to?
Either we live in an economy that has government subsidies or we don't. It creates a worse marketplace to subsidies some (car manufacturing) and leave others to deal with market forces (aviation maint.) what you end up with is one industry so far out on a limb, it becomes a massive drain on government resources.
You can't do subsidies half heartedly for long term economic management, vote winning on the other hand...