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I've read his political work, but I don't think any of what the OP said is really true. For example, the claim that Chomsky only (or mostly) cites himself is simply false. You can check this for yourself by looking at the notes for Hegemony or Survival on books.google.com:

http://books.google.com/books?id=7idg2XjTVroC&lpg=PP1&#3...

There are only a handful of references to work by Chomsky, and all are perfectly legitimate (i.e. they're not being used as a substitute for citing independent sources). The vast majority of the references are to newspaper articles and books by other authors.