Gaps between technical and marketing people

I have seen in many companies there are definite gaps between technical and marketing people. This gap makes the organization weak. Marketing department main function is to make things customer centric. It is often seen that when marketing people suggest changes in the product to the production or technical department, the technical people feel that it is not really necessary or what is asked is already existing in the product except that to get to the feature one has to go through couple of more steps (this happens mostly in software products). The reasons for this could be lack of respect for each others knowledge and priorities. This maybe rooted also because of the educational background, marketing people are from MBA background, and technical people are from engineering background. Also, could be an ego clash.