  In this paper we argue that the gauge-fixing conditions typically used to
extract the (off-shell) degrees of freedom of the Rarita-Schwinger
spinor-vector and gravitino, respectively in rigid supersymmetric field theory
and supergravity, are actually instances of the dressing field method of
symmetry reduction. Since the latter has a natural relation interpretation,
solving the ``gauge-fixing condition" -- or, better, ``dressing functional
constraints" -- actually realises the Rarita-Schwinger spinor-vector and the
gravitino fields as (non-local) relational variables. To the best of our
knowledge, this is the first application of the dressing field method to
supersymmetric theories.
