No they don’t. They have to own their land and pay taxes just like everyone else. They can’t farm dollar bills; they must participate in capitalism to obtain money to pay their taxes. They’re no different than a person of any other religion or social group choosing to live a homesteading lifestyle. Even communist communes must participate in capitalism for the exact same reasons. It doesn’t matter if you’re producing a good to sell or selling your time as a service. This is a capitalist country; you cannot completely opt out.