I guess I never really accepted this answer. Tighter purse strings help refine the creative process. It helps to rein in lofty ideas to allow WDI to discover simpler or less expensive solutions that are just as effective or more so. An imagineering free-for-all is the larger issue. Imagineering often forgets to ask "Why?" because they're too busy focusing on "How?" sometimes it's not needed or could be done better using older tried and true methods or using methods that cost considerably less. Wasteful spending is their typical MO. TDO/TDA are stingy yes, but rightfully so. Limitation breeds creativity.This.
They are only 'allowed' to do so much by the folks who hold the purse strings.
It is a never ending battle between Burbank and Glendale.
IMHO, Imagineering overvalues themselves. In truth, there needs to be a stronger third party to rein in EVERYONE. Real checks and balances. That's been the larger issue for a decade now.