TopBunk. EU legislation limits flying hours to 900 pa, as you know. Myself and many others are around the 850 mark. Others are sat at home having reached the limit. (That is inefficient.)
Take £15k from my salary and I'd take home less than £10k pa. I guess you and others on justifiably higher salaries will just accept the additional tax burden as the state coughs up additional tax credits etc.
As for challenging the document and its facts, which ones? The document is a wish list for the future, not an appraisal of the present. It isn't even a proposal as yet, just a 'leaked' draft - one of many. No point arguing facts and figures until they are on the table. Then discussion can begin, indeed there was no BA acknowledgement of the document at the lastest NSP meeting between the TUs and BA.