Is it really a no brainer though? Yes the finances in the LHS at Easy are wonderful, but if cash was the only consideration then one would also be better off staying put in the LHS at RYR.
I think you'd find a few differences in lifestyle between an Easy skipper and a 13 year BA FO, mainly in favour of the latter... the big shiny salary isn't necessarily always as important as having the control over your life that you seemingly do at BA. Surely a few years slumming it at bottom seniority is worth it in the long run?