*You are conflating church and laity. Congregationalism is a lay community.
In any event, The Rule of St Benedict long predated the Congregationalists - who used to arrest Christians in Masachusettes for NOT working on Christmas - and the Great Saint and Doctor of the Church, Bellarmine, among others, was a major proponent of Democracy.
In fact, were it not the the Catholic Church, the Congregationalists would never had a Europe Civilisation from which to pilfer the few good ideas they had
True, but were it not for the Congregationalists and other Protestants we would not have Constitution and USA as it is. Maybe something like Canada mixed with Mexico ruled by a king.