The calculator relies on you putting in what payrise relative to RPI you're expecting, so will produce anything from enormously worse off to no change. If anyone thinks they can predict what the average rise will be in the next 15 years, and what RPI will be too, then the figures will start to have a lot more bearing.
Personally, having been to the briefing, the choice seems to simply be, do I believe this is the best the union can achieve for us or not. I simply cannot see how anyone thinks the pension as it stands is sustainable based on the figures presented. And to be honest, even if this deal were accepted, there seem to be a lot of factors which may still cause the scheme to become unsustainable.
Hobson's choice?