I could name tons of examples but, as one prominent one, the CEO of Goldman Sachs (who we could agree would be a high ranking member of any "Illuminati") is the son of a postal worker who lived in low income housing as a child.
To be blunt, and some of you aren't going to like hearing this, the concept of the Illuminati and similar things, is just an out that people give themselves as to why things "will always be the way they are".