In
Nazism,
Der Fuhrer, in Italian
Fascism,
Il Duce, the position of the Leader is the axle upon which the party structure, and later, when they come to power, the government revolves around.
Hitler, in particular, established a party, and government order of competing interests, organizations, departments, over which he held complete control.
They were always coming to him to resolve the inevitable, and designed conflicts; the Leader continually enhanced his power in this manner.