To what extent did economic interests rather than ideology lead to the breakdown of the grand alliance between 1943 and 1949?

Candidates will consider the merits or otherwise of the concept that economic interests rather than ideology led to the breakdown of the grand alliance during the period from 1943 and 1949. While the focus of the response must be on the extent to which economic interests rather than ideology played a more significant role in this context, candidates may agree or disagree with the supposition. They may also suggest that other factors may have been of greater or equal importance and that the breakdown of the grand alliance was, instead, the result of a combination of factors and events. Economic interests and ideology may be dealt with separately, or candidates may use a chronological approach that outlines the breakdown of the grand alliance and places both economic interest and ideology in the wider context.