If not, is it not contempt of court?
Of course the real reason for the offer is because Thomas has shown himself to be ethically compromised, refusing to recuse himself even when the case materially involves his wife and taking gifts (actual bribes) from a billionaire without either disclosing them or refusing himself from cases where that billionaire's interests are before the court.
Since asking nicely to follow judicial norms hasn't worked, just paying the guy to go away doesn't seem out of the question.
That's really putting your money where your mouth is.
IMHO, I think there should be crowdsourced super PACs and lobbyist firms that outspend the NRA, big oil, billionaires, etc. to get policy implemented for the people.