Ahh right. I agree with that stance, except I discouraged them from trying it on and asked them to act professional, mainly because I had a story to tell and a short time to tell it.
But also boosted fees a little to encourage them to stay professional. Mechanical reinforcement.
But thats just me, and this certainly reinforces my point about different tables requiring different pay scales.
It's all good to have a story and all but it's the PC's story too huh? And if they want to run with it I'm sure it won't be that bad to let them have a run with a few side jobs. Hell it could lead to some runs in itself. 
This is really an entire different discussion, and if we are continue, it should be in a different thread. I am not adverse to doing so but its a complete tangent. However, I shall make a few brief points.
It's everyone's story. I went out of my way to avoid railroading the PCs overly. However, I've found things run smoother with a single voice in the director's seat in my group. There were things I wanted to give them, things I thought they'd really enjoy. These wouldn't happen if they got caught up in side-issues. So I told them I was pushing an agenda beforehand and then ran the game in a way that encouraged them to keep with it. That's the style I thought would be best for this game.
The time limit was a big issue. I had 4 sessions before my other commitments came up. Side runs could not lead to new runs, as there would be no new runs. It is quite possible I'd have acted differently without it.
Ultimately, the success and worth of all GM'ing philsophies and styles is judged at the table and how much fun was had by all. My players enjoyed it, far more than I did ironically, and have demanded a sequel. They gave almost no negative feedback, despite me basically badgering them until I got some. My way is not the one true way; its not even the only way that would have worked in the circs. However, given all the factors (time limit, my group, my experience, my personality), it was a way that would work.
Any further discussion should be in a thread on GM styles.