I think government loans to Airbus should be just as stringent as normal commercial loans. My bank never offered my company any loans to finance projects on the basis that they were only repayable if the project proved profitable. I don't see why aircraft manufacturers should enjoy such absurd preferential treatment.
I think US government military funding of developments that benefit Boeing's commercial aircraft division should lead to Boeing's commercial aircraft division repaying a proportion of that funding.
I think that fuel used for transport should be taxed whether the mode of transport is car, bus, train or plane.
(Lowers head below parapet at this point...)