It's funny how the majority of the people arguing against the seniority system at the airlines are ones who don't participate in it. They would have been airline pilots, if they could have just kept their seniority...
Anyhow, let me just clear up some misconceptions about what an airline pilot's union is and does.
No one answered my question before about portability of seniority between union shops, and I think I may know the answer, but correct me if I'm wrong. If I am a 15-year master electrician, not affiliated with a union, and decide to become a union electrician, do I start with 15 years of seniority when I join? I'm guessing "no." If I am a stevedore with the Teamsters, and I want to join the Longshoreman's Union (I.L.A./AFL-CIO), do I get to keep my seniority when I go from IBT to AFL-CIO? I don't think I would.
That is the same situation with airline pilots. The major airline unions are:
ALPA: UAL, DAL, FDX
IPA: UPS
APA: AAL
SWAPA: SWA
USAPA: USA (Soon to be APA)
These are each independent unions. Even ALPA, representing many airlines, is not a union, per-se, but a Association of Master Executive Councils (MECs), each operating as an independent union, in of itself.
My "Union," FedEx ALPA has Local Executive Councils in it. I am a member of LEC 79 (ANC based pilots). There are six other LECs in the FedEx MEC, with some of the LECs having "blocks" broken down in them.
Within my union (MEC), my seniority IS portable. I am an ANC based MD-11 FO. If there is an opening for B757 Captains in Memphis, and my seniority allows me to hold it, I can bid it, and slot myself in where my seniority would allow.
What I can't do, is take my seniority over to another "union" (MEC). I can't take my ALPA FDX MEC seniority number with me over to SWAPA and expect to get slotted into the middle of their list. Just like a AFL-CIO worker can't take their seniority with them to the Teamsters.
Another issue would be, when does a pilot get his or her "national seniority number?" The first day at a Part 121 airline? The date of their ATP? Commercial? What about corporate pilots? How about a military pilot who flies transport category aircraft around the world for 15 years, and doesn't start with an airline until they're 38. Do they get credit for the flying they did prior to getting an airline job? When do they get their "number?" Does he get slotted behind a 10 year RJ captain for a job flying B777s for FedEx around the globe? What if FedEx wanted to hire the military pilot over the RJ Captain for his international and widebody experience. Does the employer get to jump the seniority list because someone more junior has the experience that they're looking for?
A merit-based system is no better and ripe for manipulation. Trust me, I've seen it. The Air Force upgrades it's pilots on a nebulous pseudo-seniority/merit based system, and although it gets it right most of the time, there is a lot of cronyism that takes place. Capt Smith is an average pilot, but he's always volunteering for the additional duties... we'll reward him by sending him to Aircraft Commander upgrade before Captain Jones, even though Jones is arguably the better pilot. Capt Doe was a finance officer before she went to pilot training, so we need to get her to Instructor school ahead of everybody else so her Performance Report reflects that she's an IP so she can make Major. The list goes on...
Everyone arguing against the current system is coming at it from a point of "I can't take my seniority with me," but fails to realize that everyone else has portability, too. I'm sure that those arguing for a national list wouldn't be too happy if the portability ends up with them being constantly pushed down the list, versus them being the ones doing the pushing.
I could go on and on with the myriad of other issues with this national seniority list/national ranking system, but I'm tired and I have to fly tonight. So, that's my $0.02... It's worth about what you paid for it.