The Prime Minister is the main leader in the Parliamentary System and leads the Parliament. While monarchs have traditionally had unlimited power, in current European countries like Britain, the monarch is only a symbolic position to maintain tradition and has no true governmental power. Individual citizens elect their representatives in Parliament, which takes a lot of their own direct power in exchange for representation. While members of parliament do have legislative power, an individual member of Parliament doesn't have nearly as much governmental power as the Prime Minister.
