1) Company revenue stream is lost, lowering ability to pay any expenses including salaries, resulting in cutback to expansion plans and/or offshoring of jobs to non-union bases.
2) Salary base is higher for no increase in productivity (assuming you are at 900 hrs already), resulting in lower available cash for more salaries.
3) Reduction in working hours reduces productivity for company resulting in higher cost of their capital, resulting in diminished ability to expand to allow recruitment
So the whole thrust of your argument is that pilots can't be paid more because it'll hurt the companies ability to expand. Tell me you're BA management because thats exactly the line they trot out. It's not the employees job to fund the expansion of the company, it's the managements
So nobody else works in the airline then?
Au contraire! Too many people work in the airline! In BA we have a far higher number of staff per aircraft than our competitors, and that includes other 'innovative' airlines like Virgin. Its the other people in the airline who cost the money - the dead wood, the hangers on and the inept managers who cost us millions.