House Speaker Paul Ryan will have many career opportunities ahead of him when he leaves Congress in January. There’s one field he shouldn’t consider: lobbying.

A House Speaker cashing out to K Street wouldn’t be unusual, but that doesn’t mean it’s okay. Ryan should eschew the lobbying lucre for two reasons: First, it will certainly involve him trashing his purported conservative principles. Second, the revolving door is a corrupt and corrupting institution that has fostered the distrust and disillusionment currently plaguing this country.