With the biggest economic crisis since the Great Depression continuing to slowly unfold, one of the most surprising consequences has been a non-event: the dearth of high-quality economic theorizing in leftist groups.  This is in spite of the opportunity the crisis presents for alternative economies, and in spite of the economic conundrum that developed economies find themselves in: too indebted for stimulus and too weak for austerity. This differend between austerity and stimulus indexes the insufficiency of either and yet few have taken up the necessity of thinking proper alternatives.
The leftist response to the economic crisis has instead been mostly been to focus on piecemeal reactions against government policies. The student movement arose as a response to tuition fee and EMA changes; the right to protest movement arose as a response to heavy-handed police treatment; and leftist parties have suggested a mere moderation of existing government policies. The project to bring about a fully different economic system has been shirked in favour of smaller-scale protests. There is widespread critique, but little construction.
Admittedly, the left is not entirely devoid of high-level economic theorizing. Rather, the more specific problem is that those few who do such work are a relatively tiny minority and are typically marginalized within the leftist scene. The attention and effort of the leading intellects of leftism (at least in the UK) are on social issues, race issues, rights issues, and identity issues. All important, to be sure, but there is no equivalent attention paid to economic issues.