dwshimoda,
Get real - it's called Flight Pay for a reason - your are flying, and therefore need the allowances.
The Flight Pay referred to is NOT meal allowances which are taxed at a reduced rate.
AFAIK/can remember, when Flight Pay was referred to as Long Range Premium, it IS part of salary and is taxed at the full rate.
The case is paid for by BALPA on behalf of its members of several airlines but a win will also benefit cabin crew.
If anyone does not understand the history of Flight Pay then a Professional Pilots' website is not the place for them to comment.