(as for linking it to where you are on the scale, thats (sic) daft!)
Not if you want to make them unattractive. Maybe the subtlety was lost on you ... ?
But anyway ... playing Devil's Advocate..... if you get paid (for example) £300 salary at the bottom of the payscale for a days shift, and £600 at the top.... why should an extra days AAVA work be double time for one set of workers but not for the other .. ? Surely that is age discrimination ?