Love ya CF, but.. I must point out.
all movie making is crass and commercial, if not, there would be no industry.
taking advantage of tax law to make money IS the way its SUPPOSED to work. Its incentive-ising commercial pursuits. Its a GOOD thing when governments do this.
Look at it this way.. if I gave you $100,000 to make a movie, and said simply, you can finish the movie when every you want but you must start shooting in the next three days. Could you not find "something" to do with a camera and crew within that time?... chances are itd be crap, chances are it wont ever make it into the final film. But even if you WASTED half of that, $50,000 down the drain playing with your new RED ONE for a few weeks, youd still have $50,000! FREE MONEY! Dont be daft, take the money!
Of course, the Hollywood studio system is a business, and therefore -- commercial. However, as a paying customer, I would hope that they would at least try to deliver a solid product. Also, not all commercialism is crass. If you deliver a solid product that I am happy to pay your asking price for, that's win-win for everybody. But if you trick me into paying for your product (by using a recognizeable franchise and a big-name actor), but don't make any effort to deliver a product that I will be satisfied with, that's crass.
I think it would be hugely concensus, between basically all narrative filmmakers, that having a solid screenplay in place is a very important step-1, and you cannot move onto step-2, until you've nailed down a solid script. I think we can all agree that this makes for a better movie.
So, by deciding to shoot a large chunk of the movie, without having a solid script in place, what the producers have done is decided to do something that all rational minds would agree will very likely lead to a lesser product. But the producer doesn't care, because he'll save money.
I think it's very fair for me (paying customer) to be upset when a business makes a decision that will make for a worse product, strictly so that they can make more profit. And that is why I won't be giving them my money. If you want my money, you should at least try your best to make a good movie -- in this case, the producer is basically openly admitting that he doesn't care about the final product, and only about his bottom-line. So F him.