For someone making a pilot, assuming the talent is there and you can maneuver the system properly, it's just a matter of standing your ground and trying to make something great until you are making enough money for the studio that they let you keep making it.
My experience on 'The West Wing' was, I think, now rare in that I was pretty young, and I walked into this environment where Aaron Sorkin was giving me a script every week, and Thomas Schlamme and John Wells were keeping the studio off my back, at least as best as they could.