The union drastically shifted ideological direction throughout its history. In the 1940s, it had a significant communist influence, with high-profile figures like
Jack Hughes holding key union offices. In the early 1950s, the union was successfully targeted and taken over by the conservative
Industrial Groups, which subsequently played a role in the
Australian Labor Party split of 1955, and the union was one of four unions disaffiliated from the
Australian Labor Party. It was a key right-wing union for decades afterwards. The union was taken over by moderate left-wing members in the 1980s in a push associated with
Lindsay Tanner. The FCU was the first of four unions disaffiliated after the split of 1955 to attempt to return at the ALP Victorian State Conference in 1983. The Federated Clerks' case, 'after a bitter and at times acrimonious 3 and a 1/2 hour debate', which was 'centered on alleged links' with Santamaria, the
National Civic Council, and the Industrial Action Fund, was defeated at the State Conference by 289 votes to 189. while two of the unions, including the FCU, were refused re-affiliation in the Northern Territory later that year. Ultimately, all four unions reaffiliated with ALP in some form, the FCU through amalgamation with the
Australian Services Union in 1993. ==Amalgamation==