MTP will protect mainline crew's savings from New Fleet when it is up and running and they start moving routes over - and you can be sure that the trips which pay the best - CPT, HKG, NRT and SIN - will be the first ones to go. That would decrease the salary a lot!
With the company's suggestion crew would in average get £750 a month on top of meal allowances and their basic salary - some crew still claiming they would be worse off with MTP. How many LR trips are they getting every month?
Still - some crew or BASSA wouldn't even accept the MTP if BA offered £5000 a month