Aircraft design is the art of making something workable from a set of competing and conflicting requirements. Limiting the set of basic considerations to a couple of key parameters is generally crucial to make a really succesful design. Limiting and prioritizing the requirements is therefore an important and essential task and an art by itself.
When government bureaucracies are involved in this process, then the reality is oftentimes the opposite of this approach. There seems to be a natural tendency to desire a system, which can be everything for everybody, which is of course like chasing after a dream. Such a pursuit might be attractive, especially when you are much into dreaming, but as the main consequences generally are ballooning and uncontrolled costs as well as not really performing well in any domain, it often leads to very expensive disasters.
The F-111 might be mentioned in this respect.
This book deals with the F-15, a very succesful as well as beautiful fighter design, both in performance as in its development history. It might therefore appeal to anyone with an interest in fighter design. Are there any lessons here for the ever more painful saga of the JSF development?