I kind of think WW2 itself had as much to do with the demise of English manufacturing as much as anything. Before the war BSA's slogan was 1 in 4 a BSA, referring to their world market share. A world market that included a British empire that spanned the globe and a built in transport network to support it. By 1945 the empire was mostly gone, the US had far surpassed British manufacturing capacity, and we had more than ample means to deliver goods worldwide. You are 100% correct however in the idea of a rethink of relations between those that produce/consume goods and those that direct that production. Who knows, BSA might be making more than scopes and air rifles today if that had happened in the 50s.