Why does the business have to revolve around IT? Why can't IT be made to revolve around the businesses needs? This is a question to answer by looking at cost/b

Why does the business have to revolve around IT? Why can't IT be made to revolve around the businesses needs? This is a question to answer by looking at cost/benefit on particular processes, not a moral issue. It is also not the same as saying "you need to put your IT guys in charge of the business."