Marketeers are too important to leave marketing to others

“Everybody has to be cost conscious and keep their budget, that is natural, so kick out the controllers we don't need them anymore!”
“Of course we make quality products, anything else wouldn't sell, so we don't need quality control, kick them out!”
“Everybody has a PC at home and knows about installation of software and else, so we don't need IT-coordinators/support at the workplace.”

Who would come up with these ideas and would still keep his job? Nobody, of course.