And why couldn't I hire a private enforcer of those contracts? Why does a central state need to do this? And what of Eminent Domian and Property Taxes?
You don't own your property. You are granted the privilege of using it by the govt who can take it away at any time, for any reason.
Would a private deed enforcer be able to come to you and say "Sorry, we own this now. Get off." or "We need 10% of what we thing the value of the property is every year, or we take your property."?
The state isn't an enforcer of contracts, it's a pirate that lets it's victims trade use claims to it's booty.