A secretive payment to consultancy giant KPMG is raising questions around MP Angus Taylor and the "watergate" scandal.

While the ALP calls for failed Virgin Australia to be given more public money, key front benchers have failed to disclose tens of thousands of dollars in gifts from the airline.

Federal MPs have been accepting largess from Virgin Australia and Qantas for years, long drawing concerns from governance experts.

Energy Minister Angus Taylor has disclosed he and his wife were gifted memberships to Virgin Australia's and Qantas' exclusive lounges.