You are asking something that is beyond the scope of this forum. Try the Scenario creation one instead. I believe some of the government actions are hard-coded into the program, but I have heard of such substitutions as Fascism and Theocracy so someone has found ways to alter them.
Whoa. I've got serious cobwebs.
I did play the Fascism Patch back in the old days, but remember....nothing.
Didn't perservere with it though, so it mustn't have impressed.
OTOH, this was before modern playing style. Maybe it would fly using
Power Democracy technique. Anyone tried it?