Coppieters' political career began when he became a member of the Volksunie (VU) which was formed in 1954.

At the same time, Coppieters was the President of the VU in the newly formed "Cultuurraad voor de Nederlandstalige Cultuurgemeenschap" (Cultural Council for the Dutch-speaking Community, later the Flemish Parliament), of which he became the President when the VU formed part of the government.

In 1996, Coppieters joined forces with De Batselier to promote "Het Sienjaal",[4] a text which was written with a view to achieving political revival beyond the party boundaries.

His biography consisting of a number of articles by people who've known Maurice in his different functions was presented in the Flemish Parliament on 10 November 2009, 4 years after his death.

It bears the title "Het Laatste Jaar van de Klaproos".