Argento:
I believe that your (and Chip's) argument that US Airways will likely acquire much of United's domestic system (given US' new, lower cost structure and UA's current problems that could result in a bankruptcy filing soon) is logically flawed. It rests upon the combination of two assumptions that are extraordinarily unlikely to occur together in the real world.
First, it assumes that UA employees would not accept contractual changes similar (or even identical) to those adopted by US' employees as a last-ditch action to save UA from being fragmented. Frankly, if faced with such a dire situation, I personally believe that the UA employees would bite the bullet and do what was needed. Of course, that's just my opinion. Yet if they do it, end of story, no fragmentation of UA. But OK, fair enough -- it is certainly possible that UA's employees actually might NOT do what would be needed to avoid UA's demise if the price tag was deemed to be too large.
But then your argument makes a second (at least implicit) assumption that also must occur -- that a substantial portion of UA's employees, having rejected US wage levels at UA, will now accept such wages from US (minus seniority, ESOP shares, BOD seats, etc.) to work at the former UA operations to be acquired by US. This defies all logic.
Now, I don't recall if you have explicitly said as much, but your argument requires the use of large numbers of former UA employees to make the US acquisition work. Why? Let's conservatively assume that only 50,000 of UA's current 84,000 (or so) employees are needed to run its domestic operation, and only about two-thirds of those (say, 35,000 in round numbers) are needed for the part that US would acquire. Even if US recalled all of its currently furloughed employees (12,000 or so, right?), that would still leave US with the predicament of finding over 20,000 additional employees to run the newly-acquired operation. Where else would they come from? Virtually no former UA employees would accept a job under these conditions -- if they wouldn't do it at UA, why would they do it at US?
That's not to say there aren't a large number of potential new US employees out there, between furloughees and others just waiting for the opportunity to work in the glamorous airline industry. But US would not just need to hire these 20,000+ new employees, it would also need to train them (at least to some extent), confirm the holding of FAA licenses where appropriate (pilots, AMTs and dispatchers, and maybe others), and place them where needed around the country.
And US will need to do all of this in a way that there is a seamless transition, literally from one day to the next. Because if there is not a seamless transition, at least from the traveling public's standpoint, the value of the acquisition will be greatly diminished very quickly as other carriers take advantage of the ensuing operational problems that the new US would be experiencing to siphon off passengers to their own networks.
IMHO, such a unique corporate transaction does not take likely employee reactions (or psychology) into account, and thus it would be nothing short of a logistical nightmare as US tried to overcome the likely departure of thousands of former UA employees that ran the acquired operations. And this is only from the perspective of staffing issues. What if some of the aircraft lessors and trade vendors don't want to play ball? I'll let someone else discuss that aspect of the situation.
BTW, I'm not an employee of UA (or US, for that matter), and I don't even play one on TV! So there is no argument that I'm trying to protect my job, or that I'm in denial about the future.