Alan Carter's libertarian communist critique of Marxism as an ideology developed by a rising "managerial-technical" class that would replace the bourgeoisie as a new ruling class without altering in any fundamental way the exploitation of the proletariat. Carter attacks historical materialism, Marxist economics, Marxist sociology, Marx's theory of the state, and Marxist-Leninist politics (which he identifies as the form of politics advocated by Marx himself).
See also useful analyses and
See also useful analyses and critiques of Carters work:
http://www.revleft.com/vb/marx-radical-critiquei-t16990/index.html - in-depth review from a RevLeft user
http://www.worldsocialism.org/spgb/socialist-standard/1990s/1995/no-1085-january-1995/marx-against-state - review by Adam Buick