People who argue that government interferes with freedom of expression, free markets, and society, and thus should be limited to as few spheres of activity as possible, are best classified as

libertarians

Explanation:

Libertarians believes that a person must be given a choice to live their life as they see fit as long as their choice doesn't interfere with anyone's right.

It enforces individual freedom without the interference of the government.

Libertarians is focused on each person's right to liberty,property and life which occurs in a natural way before the intervention of the government. It believes that a person can survive without being under governance in a natural way as possible as long as the government governs only those things that extremely violates others rights.

According to libertarians a person shouldn't be restricted to live their life their own way and choose what ever path the only things that can be restricted are those that affect the other person such as murder,robbery, kidnaping and fraud.