How can it enforce this without taxes (which are nothing more than institutionalized theft)?
Taxes are a necessary evil just like government but I was talking about laws designed to protect the interest of another citizen such as laws against murder or tresspassing. These are good laws that protect citzens from the unwanted actions of other citzens such as someone involuntarily murdering me.
Our Founders put a great deal of thought into the U.S. Constitution and gave us an elegant document outlining what must be the responsibility of the government in order for us to be a people governed by social contract, but mostly it is a document intended to limit the power, scope, reach, and authority of the Federal government.
They rightfully knew that a strong military would be necessary as there would be enemies determined to take our freedom and self determination from us. And they knew that we would each need to contribute something to sustain the government including the military so that it could carry out its constitutionally mandated responsibilities.
But mostly their intent was for government to defend us and to put sufficient enforceable laws and regulation into place to discourage us from doing physical or economic violence to each other and/or treading on each other's unalienable, constitutional, legal, and civil rights. Otherwise government was intended to get out of our way and allow us to live our lives and prosper or not according to our own industry.