Jung maintains that dream phenomena are not simply secondary to the contents of consciousness, in fact:

"...the signifigance of the unconscious in the total performance of the psyche is probably just as great as that of consciousness. Should this view prove correct, then not only should the function of the unconscious be regarded as compensatory and relative to the content of consciousness, but the content of consciousness would have to be regarded as relative to the momentarily constellated unconscious content..."

(from the essay "General Aspects of Dream Psychology")

This is Jung's verbose way of saying that dreamlife is just as signifigant as waking life to our psychological makeup. I would take this idea further, and say that perhaps there is no real distinction between conscious and unconscious--one cannot exist without the other. We construct a boundary between the two systems of thought and experience because we are terrified of losing our grip on "reality".