Content Management - Avoiding the bloat

I've seen a few bits and pieces recently from people grumbling that CMS don't solve any problems, just create new ones, and I reckon this is because a lot of companies buy in the excellent top-of-the-range Documentum/Broadvision-style systems. People often refer to these products as "solutions", but what is the problem they are trying to solve? In the case of most CMS implementations, I think that the problem is usually - at the beginning at least - the simple one of making sure that the right people publish relevant and timely content that is similarly formatted. If this is the case, do you really need all the bells and whistles? Maybe it is better to invest in/build a simple extensible framework that can be added to in an iterative fashion as CMS needs develop. Keep it simple, start stripped-down and then develop plug-ins and add-ons according to need.