I hear where you are coming from and don't entirely disagree, there are hurdles.

as for 3d guns, there are still normal firearms being illegally bought and sold even with our governance system, so i (personally) think that is a moot point. i think chemical weapons, atomic weapons, etc are probably a better/more realistic concern about removing governance.

money broadly allows people to specialize in skills and division of labor. I believe there will still be detectives, personal or communal protection. but in my opinion using a central government to divide the citizens wealth to the proper channels CAN (not always) usually be done quicker and cheaper had the people done the work themselves, or find someone else specialized in said skill.

I think there is some credibility to the Greek liturgy system or some sort of city state alternative, which *should* in my opinion be opt in.

I don't have any real solutions to these problems, I'm just painfully aware that expecting bought&sold politicians don't have their constituents best interests at heart. maybe a new money with a good incentive structure can fix that, but i don't have faith that the government can course correct itself.