Most, if not all, of the SIC members are the politically powerful members of the Senate, who will only be replaced at the polls if they screw up in an unrecover

Most, if not all, of the SIC members are the politically powerful members of the Senate, who will only be replaced at the polls if they screw up in an unrecoverable way (usually a sex scandal - people remember those). At any rate, because it's a rotating membership, there's no guarantee that anyone with any shred of decency toward privacy will wind up on it.