I dont think it is that simple. If you read Fujifilm's quarterly results, they do not make much money at all from digital cameras. Hard to believe but it is true. In fact, their entire imaging division LOOSES money. I looked back from today's year all the way back to 2005. Not one year reported a profit in their imaging division. Not one. It seems that their film chemicals keep the looses from being too high.
Second, they want to price E6 film so that it has a stable, if not slightly growing market. They cannot just gouge people on this as E6 photography for the most part is a luxury now, not an essential purchase.