I'd guess that about 1 out of every 3 workers classified as HDQ will lose their jobs one way or another.
Retirement will be an option for some, and there is no shortage of people 50 and over who would take an early out. Some jobs in Tempe will move to Fort Worth, and not everyone will want to (or will be able to) move.
1) Try to remember that easily half of those folks earn less than what a crew chief does.
2) Not everyone counts beans. Some do flight scheduling, IT, order toilet paper and market bags, negotiate for landing slots, haggle with credit card providers, respond to complaints, make sure you get paid each week, try to make sure that fares are being filed & matched, deal with the TSA, FAA, OSHA, DOL, DOT, and probably another 20 or 30 government and state agencies I can't recall...
I'd expect a lot of those who were going to leave voluntarily have already done so, to beat the rush.
Sabre's been doing a lot of silent recruiting over the past six to eight months; I suspect that's going to slow down considerably after today, especially if there's doubt over staying with Sabre. There's obviously no love lost between US and them on old history, and no shortage of lawsuits involving both AA and US with Sabre from the past few years.
So, while all you union people dance on Tom Horton's proverbial grave, remember that there are going to be probably 2000+ people who you never see that will affected by this. 2000+ more people who may or may not be able to find a job in Obama's economy.
Half can probably find a comparable job in another industry, but a good number of them will have spent their entire career working for an airline, and that's an ever shrinking job market.