>A market maker who doesn't know if their counterparty is a Trump insider looking to fleece them must ask for a bigger safety margin to cover the risk they are taking -- and not just from the insiders. Honest participants in the market get taxed in order to provide the insider payout.
That's still corruption. Your argument about other participants being "taxed" applies for other sophisticated counterparties as well, eg. hedge funds with armies of analysts and can fly helicopters around to gather intel. Unless you want to say that's bad too, the only difference between the two is that the hedge fund isn't engaging in corruption.