I agree completely that we do not necessarily need to posit and organized "Illuminati-like conspiracy" to have cause for concern. There are plenty of studies showing increasing likely-hood of sociopaths rising to the top of power structures, and is often just due to how to system as an autonomous entity functions.
What I do posit though, is that, in fact, there is, borrowing your own term for lack of a better one, an "illuminati-like conspiracy". I have been considering an attempt at scholarly paper on the matter for some time now, but let me try to be terse and possibly just point you in the right direction, because I don't think I'm quite prepared to defend the full assertion in public yet.
I will start with your question about power feedback loops. Here is a paper regarding the global network of corporate control that anyone interested in the global power structure should read. http://arxiv.org/pdf/1107.5728v2.pdf
I even contacted one of the researchers (Glattfelder) during the Libor scandal, wondering if we could use some of the new information to analyze the scandal better. He said it would be extremely difficult due to how good the companies are at obfuscating their dealings.
Now, as far as the conspiracy, I would like to point out one thing. I do not claim that there is but a single conspiracy (a trap assertion many fall into making), and instead would say there there are but a small number of very powerful ones operating at any one time, sometimes in competition and sometimes cooperatively. Regarding the "illuminati-like conspiracy" itself, I have one primary reading source for you, if you are genuinely interested in the subject. It should be enough to get you started on the more serious analysis of what I am talking about.
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