Willie reckons you're not up for a fight
This has little to do with either the pension defecit or NRA. It has all to do with divide and conquer.
A new joiner would be very grateful to get an extra 5 years paid into his/her non NAPS defined contribution scheme.
Very simple solution, get Willie to pay command compensation to each co-pilot just below the command point on the seniority list for every guy that stays on past 55.
If it's 500 then pay 500 SFO's full Captains Salary & all benefits associated with command.
How's the Mondeo Willie?