Chapter 11 of the U.S. Bankruptcy Code is NOT a government subsidy. What IT IS is a mechanism that is not available in the rest of the world for a company to reorganize on backs of its shareholders, creditors and employees. The practical application of that is that it has allowed U.S. companies to reduce operating costs. In much of the rest of the world, similar reorganization is not available and they must either trudge on or liquidate. I believe that the ability to have something short of liquidation is enlightened BUT IT DOES uneven the competitive playing field from the perspective of companies that have to compete with that.
Not all of the White Paper or the accompanying 1000 page report dealt with subsidies. They also used examples of relationships, mechanisms and infrastructure that caused an "uneven" playing field in their opinion. I think the point is that it works both ways and the US3 are not the only aggrieved parties.
Where direct subsidies can be proved, by all means do something as an agreement was signed that precluded them but given the anti-trust immunity that the major U.S. carriers have for their alliances and the consolidation that has been allowed at the expense of consumers, I can't help but see some similarities with the behavior of the large U.S. companies in the late 19th and early 20th century. The US3 have gotten almost everything they have asked for and now they want more.