Those who don't "work" in the public sector already go the Non Aggression Principle on a daily basis. Also, to note, many law enforcers have been reported to have harmed and/or killed people who never intended to harm in the first place. Do they get jail time? Mostly, no. Good rules that are reasonable, fair, and consistent would be better than what we have now.
All economic transactions as voluntary within a free market economy would be less oppressive than a mixed economy in which has coercive policies thrown in...
Government itself has a gigantic monopoly on force. And without government protection in a heavily regulated economy, it would be tough for corporations to hold onto their monopolies.