The possibilities for an underlying theory behind an effective supersy
mmetric Nambu-Jona-Lasinio like model of electroweak symmetry breaking
with propagating Higgs bound states (e.g. supersymmetric topcondensat
ion) are investigated. The concept of a renormalizable underlying theo
ry turns out not to be appropriate. We argue that the new theory shoul
d come from the Planck scale and be connected to supergravity. Such a
model can be constructed but necessarily implies a nonlinear definitio
n of the full Lagrangian.