My SUV, assuming Hummer comes out with a model for those who find the current ones too cramped, will look something like the Louisiana Superdome on wheels. It'll guzzle so much gas as I walk out to my driveway there will be squads of Saudi princes gaping and applauding. It'll come, when I buy it, with little Hondas and Mazdas already embedded in the front grillwork.
Cost overruns are not uncommon in architecture, particularly for designs that depart from structural or technological norms, or demand a finer quality of execution than commercial schemes - conditions typical of buildings for cultural institutions. Budgets are exceeded for many reasons, not all of them within an architect's control.