You’re the one who seems to have implied that because I said that the mekor of Choshen Mishpat is the sugyos of Seder Nezikin, therefore those learning the sugya should be able to answer halachic shaalos.
Learning the sugya is the beginning. The svaros of Abaye and Rava sharpen the minds of those who learn them. Nobody will get semicha from just Tur and Shulchan Aruch.
I don’t advocate cheating on taxes or claiming benefits and government programs that one isn’t entitled to. I certainly hope that my rabbanim aren’t permitting that. I was raised by upstanding parents.