IMPERATIVE that we insist on a mix of types of trips, and a limitation on how many reserve lines are built.
There is already a mix of trips. Even if the pilots had complete control, you would find that one size does not fit all. There should never be a limitation on the number of Reserve lines. The need can change month to month, under our current system. If there are not Reserves to cover the trips, and you hold a Regular line, do you want to get extended at the end of your trip or junior-manned on you day off. Limit the Reserves, it is guaranteed to happen.
Currently we have NOTHING that prohibits the company from building 10 hard lines and putting the remainder of the pilot group on reserve.
No contracual limit exists, because there is no reason. Financially, it would be a disaster for them to schedule like you suggest. Ideally, it would be most advantageous for them to cover the flying, building as many lines as possible to guarantee or greater. That is impossible, but PBS will give them the next best thing. Ideally, Reserves would not be necessary at all if no one ever called in sick, needed leaves, quit, and there were no IROPS. But, that is not reality. Reserves are needed for those events to guarantee schedule integrity (high completion factor). Under PBS, less Reserves will be needed because those are the events that they will be used for. Open time will be near to none, thus requiring less staffing for Reserves.
We are currently running about 30% on 200 reserves. We STILL don't have enough reserves. They call everybody in for a round trip and extend, extend, extend....