There are reasons companies such as RP and AW that give millions to airways. One being that they have money that can be used. The money given to airways is going to make money for RP and AW because they are LOANS.
These companies have a vested interest in the success of US. They are not buying there flying. Yes maybe Airways MGT looks favorably towards them because of help.
But you show me who says or where is says that PDT and PSA are the only ones making money for airways. As many PSA pilots say.
Well that money the contract carriers are lending was given to them by USAir (and others) in the first place. They are just being lent profit that they gave the contractors. Look I'd do the same thing if I was a contract carrier, not disagreeing with you at all in regard to their business practices.
USAir would much rather keep the profit in house with the WO, but obviously it's still cheaper to farm the flying out to companies that pay their pilots .40 cents/seat/hour in the right seat.