The Chief Whip may attend meetings of the cabinet, but is not a member of the Government. In addition, the Government can select other Ministers of State who may attend cabinet meetings. Up to three Ministers of State who regularly attend cabinet meetings may receive an allowance. This person is informally known as a "super junior minister". Currently Jack Chambers, Hildegarde Naughton and Pippa Hackett are Ministers of State who attend cabinet. Trinity College Dublin law professor Oran Doyle has argued that this practice breaches cabinet confidentiality as required by the Constitution.