Right now, I can't think of a good way to have everyone voluntarily fund infrastructure. No nation-state has ever functioned without the threat of state-impose

Right now, I can't think of a good way to have everyone voluntarily fund infrastructure. No nation-state has ever functioned without the threat of state-imposed force. It's not a pleasant reality, but nobody really knows how to do better at the moment. The only known alternative is scaling back civilization to pre-city-state conditions. But perhaps you have some suggestions on how to actually do this. Regardless, this idea you have - that governmental "force", or any kind of institutional force that suppresses your individual will, is some kind of ultimate evil - seems very misguided. The laws of biology and physics will override your will and force you to degenerate and die. Micro-organisms will force you to cough up blood and die. Wild animals will force you to give up your flesh and die. Collective human institutions are the only things that have successfully imbued individual humans with an order of magnitude more power and more rights than our primitive ancestral conditions would allow. Many of these human institutions are also abusive, however there doesn't seem to be an alternative to forming collective human institutions that require forced large-scale group efforts if we want to actually not die of malaria all the time.