There is much discussion about how in the cold war, a swath of countries from East Germany to China ran as states led by one party. Not much discussed is how many western aligned countries did as well. As the Cold War heated up, from 1949 to 1972, the Liberal coalition ran Australia. In 1972 another party is elected into power, and an extraordinary amount of energy from within Australia and without (UK and US) went into undermining anything but the old one party led coalition. Whitlam was undermined every day for his less than three years in power, then ousted by the retainer of a foreign queen, so that the one party led rule would continue to 1983. Of course the undermined <3 year interruption to one party led rule was "bonkers" to those supporting decades of one party led rule.
One party led rule from 1949 to 1983, with the one elected other party with less than 3 years ousted by a representative of a queen. These people then had the gall to criticize the one party led coalitions running China and East Germany as being one party states that blocked political pluralism.
The same thing happened in the other western aligned countries in the Pacific during the Cold War - Japan, South Korea. The same case in South Africa, Italy, France etc.