  The original derivation of Power Functional Theory, Schmidt and Brader, JCP
138, 214101 (2013), is reworked with a view to simplifying the logic and making
explicit the various functional dependencies. The result casts doubt on several
aspects of PFT such as its ability to provide equations of motion for
non-equilibrium systems. It is concluded that this aim is probably not possible
without explicitly including more information about the underlying dynamics.
