We'll just have to agree to disagree.
Merging the old and new contracts in your eyes might be asking for more but there should never have been different rates of pay for people doing the same job for the same airline.
You would feel the same way if you were paid 50% of another employee doing exactly the same job as you. Alas you don't else you might be singing a different tune.
As for the going rate of cabin crew. I am earning less now working for BA than I did working for another airline. My choice I know.
As I said before this discussion with you is pointless. It is however interesting to see your keen interest in the CC T&C's. It must be awful having to work with people you so clearly despise.