Mr Coffee,
Where to begin?
Management introduced working past 55 as a way to crew aircraft whilst growing the airline back in 2006(?). Initially, only commands on the freighter were offered and later it was available on any fleet. The DFO at the time assured junior pilots the time to command would not be affected.
When management introduced COS 08, they took away bypass pay as well as reducing some salary scales. It was a significant cut to B scale, but did allow working until 65.
You seem poorly informed. COS 08 was not endorsed by the AOA, it was brought in by CX Management unilaterally. Just like they will introduce a COS 17/18 with all the stuff they think they can get pilots to accept.