Of course wealthy interests played a role. And there's also evidence of foreign interference which was never fully investigated or disclosed. Those are seriously problematic. But they are different from implying (like point 16 in the OP does) that there is an organised global network or wealthy people whose goal is to take over countries and who have taken over Chile and Indonesia and are now happy to add the UK to their list.

From my reading of this, it could also imply an unorganised set of the predatory wealthy all acting within their own self-interest, rather than a conspiratorial cabal.

That such 21st century robber barons are seeking to gain from Brexit is no secret. It is likely this is what the author refers to.

It doesn't need to be an "organised global network" as in "sinister people gathered around a shady table". But it's naive to think the mega-rich don't use their immense power to influence entire countries and the fragile democracies therein.