  We propose a new dynamical relaxation mechanism of the little hierarchy
problem, based on a singlet extension of the minimal supersymmetric standard
model (MSSM). In this scenario, the small soft mass parameter of an MSSM
singlet is responsible for the electroweak symmetry breaking and the non-zero
Higgs vacuum expectation value, whereas the effect of the large soft mass
parameter of the Higgs boson, -m_{h_u}^2 is dynamically compensated by a flat
direction of the MSSM singlets. The small singlet's soft mass and the Z boson
mass can be protected, even if the stop mass is heavier than 10 or 20 TeV,
since the gravity-mediated supersymmetry breaking effects and the relevant
Yukawa couplings are relatively small. A "focus point" of the singlet's soft
mass parameter can emerge around the stop mass scale, and so various
fine-tuning measures can reduce well below 100. Due to the relatively large
gauge-mediated effects, the MSSM superpartners are much heavier than the
experimental bounds, and the unwanted flavor changing processes are adequately
suppressed.
