The SEC has come under fire from members of the Senate Judiciary Committee for not fulfilling statutory duty to protect individual investors, because all brokers require arbitration, and arbitration does not provide a court-supervised discovery process, require arbitrators to follow rules of evidence or result in written opinions establishing precedence, or case law, or provide the efficiency gains it once did. Arbitrator selection bias, hidden conflicts of interest, and a case where an arbitration panel refused to follow instructions handed down from a judge, were also raised as issues.