Where there are goals and sub-goals there has to be accountability, that is, does the sub-goal help to achieve the goal that it is subordinate to? In the case of goals pursued by the awake and conscious mind, this accountability can be identified with "reward" and "punishment", "happiness" and "sadness", and "feeling good" and "feeling bad", elusive though a precise description of these concepts may be.
    If the dream-maker pursues its own special goals distinct from those of the waking conscious mind, then it must have its own separate system of accountability. There will have to be some measurement as to how "successful" given dreams are, and some feedback of that measurement into the systems that control the behaviour of the dream-maker, that is, the creation of dreams in the future.
    To give a simple example of how this applies, suppose that a given dream becomes lucid. The lucidity results in a loss of intensity of experience, and this is measured as a reduction in successfulness, which must be applied as a "punishment" to the dream-maker. The dream-maker responds to this punishment by attempting to restore the desired state of non-lucidity.