# Soft SUSY breaking fermion mass terms in MSSM for matter fields

In the Minimal Supersymmetric Standard Model, the chiral fermion fields (the Higgsinos) don't have any soft SUSY breaking mass terms and soft SUSY breaking trilinear interactions while their scalar superpartners (the Higgs bosons) have so, whereas naively it should have been the other way around, in order to explain the fact that the superpartners have higher masses than their counterparts in the Standard Model. e.g The gauginos have soft SUSY breaking mass terms and intuitively obey this naive expectation.

1. Why do the chiral fields have such a distinctive feature as mentioned above? Why don't gauginos share the same feature?
2. Why do the scalar Higgs get contributions instead?
3. Also how do we calculate the coupling parameters of the $L_{soft}$ terms starting from first principles? Or are these parameters arbitrary?

EDIT : As pointed out in an existing answer, starting with soft terms for chiral fermionic components is possible but redundant. But precise details are not given there. The third part of the question is answered well enough, but I need necessary details for the first and the second part. I am following arxiv.org/abs/hep-ph/9709356 where these questions are not addressed.