Making it Harder to Annex or Occupy Settlements

[Sidious]

I was wondering if there is a way to make it harder to occupy (or hold occupied) Settlements? That way making peace, confederations, satrapy, or client states are more desirable and a useful alternative to just steam rolling everyone. I am assuming that it would be a couple values to edit, maybe making public order harder to maintain on occupied regions. Any help would be greatly appreciated.

[crzyrndm]

campaign_variables -> Occupation_decision_... control the various outcomes.