Ive worked in a variety of business sectors and very rarely do IT departments seem to want to help and be engaged with the business. All too often they are more concerned on whether people should be using facebook, and what other sites can they block due to "security" or "bandwidth issues". I see many departments think that they are running the business rather than supporting the business. All the while the business almost becomes afraid of IT. It took me a few years to learn this, but when IT does come from the finding a solution attitude, then the business listens and IT is the hero again.

Yes there will always be specific projects or other implimentation issues that go wrong or are more work then what they may be worth. But I bet you that their are Marketing projects or Finacial plans that are more work than what is expected by the business and I bet that they are complaining about the same kinds of things that IT does.