Yes, in theory, anyone can be an insider. But folks up in the chain are much more likely to be "insiders with information". I should have probably said "very rich insiders" instead of "true insiders."
Yes, sorry, I was only replying to the general point.
About the specifics we have here:
It's sad that the highest ranking officials are willing to corrupt themselves over a few million here or there. (And that's already pretty high by corruption standards. Usually you here of even much lower bribes etc being enough.)
To be pithy: I'm not angry that you can buy officials and politicians. I'm angry that the price is so low.
Why? A secretary or janitor or a intern could also be an insider. Or are they No True Scotsmen?