Dreamshiner,
Ba pilots will not be happy for non mainline crew because of;
-it's their job and a future command
-the operation is expanding without mainline pilots thus 'diluting' the ba pilot workforce, potentially weakening their position
-a two teir system may develop, new ba mainline flights & ba a/c with mainline and non-mainline crew. This can have an effect on pay deals & T&C
An analogy - It's a bit like Naps and BARP (money purchase). Within x years, the majority of pilots in BA will be on BARP. The company will withdraw NAPS for all members. All future pensions will be BARP. There will be lots of noise from the minority of NAPS pilots, but no strike. History repeats itself in different ways, and some are not able to see beyond their own hand - just the way management would like