Not sure the average representative is the right benchmark, that's not the real insiders. The real insiders would be in the upper ranks of congress, with prominent seats in commissions, part of security briefings, and with front row in draft legislations (the average representative first discovers the proposed new law when a 7000 pages final version is dropped on their desk 20 minutes before the vote).

Sure, or friends of the representatives who just reward said representatives later after they leave congress, etc.