how do you build a life on 782 pounds a month after tax and NI payments deducted.
Aaah, but you don't, do you? On top of that you have that vast array of extra payments that attract varying rates of tax and NI contributions. Allowances, back to back, CAT lounge, one down - take your pick. These more than double your take home pay.
That is why BA's offer includes a monthly payment that averages out these variables. Indeed for the average new contract cc the BA offer means you can continue to bring home EXACTLY the same as you do now, just that you have to work a bit harder for it.
There are thousands of people in Longbridge, Luton, Crawley, you name it, who would love to have been offered an "efficiency saving" like that, but instead they lost their jobs.