The government isn’t a corporation separate from the people that you contract with. It is the organization OF the people to look after common interests. Ideally, anyway; it just turns out that, like almost any organization, people looking out for their own interests first get attracted to the positions of power.

Backing out of your financial participation means you should lose out of all of its benefits, like roads, schools, firefighters, and subsidized food/whatever prices. Also legal protection of any kind, so it’s the Purge against you, specifically. Have fun!