So the American occupations rigged the Italian and Japanese post-WWII election systems pretty steeply, as a necessary condition of keeping Communists out of power (who were expected from Iron Curtain precedent to eliminate any possibility of being removed from power and defect to the Soviet Bloc).

If you will remember your economic materialism this is what you would expect from industrial powers without imperial hinterlands. (This is what the WWII authoritarian culture-states were meant to prevent while they assembled empires!)