Wrt the subsequent 'scales', I recall that - when we got wind of it - some of us 'A' scalers proposed & were willing to forgo any increase in our own T&C's, if that'd mean that there'd be no 'B' scale... well you can go figure how successful was that suggestion?! (
but, nonetheless, we tried)
Ah well, two buckets (aka
Hertzberg's Theory of Motivation) !