Human Factor.
I think the main incentives that would encourage pilots to jump ship would be:-
- Final Salary Pension or much improved Money Purchase Scheme
- limit of 800 flying hours per year ( or less!)
I think it is right that many people may not actually jump ship when it comes down to it, but I think the 15 year to command argument, although good, isn't the big thing.
Most of the big holiday charter companies have no plans to expand, and possibly plans to contract, and that means there are no commands in sight, probably for the same kind of time at BA.
However, most charter companies have a limit on the max flying hours per year and also some still have Final Salary Pensions (though not necessarily to new joiners).
Also, most charter company's pilots work near enough every weekend and are still flying the crap routes even if very senior.