I think they worked it out like;
£45 x 35 hours per week x 48 weeks per year = £75,600.
Last year they put us behind upper Government Officials, Company Directors and Medicine and gave us an annual salary, across the profession, of £75K. For an average, taking into account FO and captain, regional turboprop and legacy long haul etc, I think £75k sounds about right.
I have yet to meet a pilot who believes they are paid enough!