Correct, the pay issue does not have to be connected to the SLI.
Just like the 'status and catagory' of furloughed pilots hired by the other airline as covered in the transition agreement, an SLI arbitrator will not change anything that has already been agreed to by both parties.
SO, if both parties were to agree that for the purposes of SLI the 747 is to be considered the same as the 777, then the "seniority grab" is taken care of.
AND if for the purposes of the SLI, it is agreed by both parties that the 747 will NOT be fenced (so that the highest paying aircraft is available to ALL pilots based on seniority), then the "pay discrimination" is taken care of.
This could be easily reconciled with a compromise. If fairness was truly in play, instead of more me, me, me, unethical and selfish posturing. Ethics and morality are a constant value and not conditional to the topic. I take issue with the argument that each side should try to get the best for it's pilot group at the expense of the other pilot group. How about just doing what is right? Of course, human nature being what it is, I am not naive enough to think this will happen, but I won't excuse selfish behavior during this process as "what they should be doing".
Yes, the 747 should pay more than the 777. However, at the time of the merger announcement and corporate closing, it does not. Any attempt to correct this wrong should not be at the expense of either party and should be done in a fair, equitable manner.