Maybe this is a controversial view but if 67 happens and ICAO is slow or unwilling to following suit, I wouldn't be against pay protecting the pilots at the top at their pay, at least in principle. Even if this was only available to the pilots currently occupying those seats and not in the future, a good deal for some pilots doesn't necessarily constitute a loss on my part. On the other hand, if the company's unmoving stance is they want some large concession in return, then I'm wholly against such a deal. As always the key would be in the language and the details.
Why even bother arguing over it at this point though? We don't know how 67 is going to play out in Congress, let alone the company's or ICAO's reaction.
Edit: I do wonder though if this could be an opportunity to bring everyone to our WB rate (like UPS), with only longevity and CA/FO scales.