No, it is the duty of the justices of the Supreme Court to be completely unbiased and fair in their decisions, which is encouraged by the fact that getting onto the Supreme Court is the last career move for a justice. The justices should not be prohibited from making transactions with people who have a vested interest in court outcomes because the justice shouldn't be influenced by such things anyway, and if they are then that means that Congress failed in their interview and the FBI failed in their investigation to prove the nature of the justice, or that the president made a politically motivated decision in their recess appointment of a justice. And of course, if a justice is truly not being unbiased and is accepting bribes from parties with vested interest(s) in the court ruling(s), judicial impeachment exists for that reason.