This is a list of “How to be Thrifty”.
Sorry, “Going Galt” is buying land in rural Colorado, selling everything, moving and recreating another society/economy.
It is about being thrifty to some extent. Pure “Going Galt” is as you describe it, but the concept is the same: disconnect from the economy and the system that is trying to suck you dry.
I also like the suggestion Mad Dawgg put up about maxing your deductions. That has nothing to do with being thrifty and everything to do with denying the gubbermint (what is essentially) a loan.