The G20's transparency and accountability have been questioned by critics, who call attention to the absence of a formal charter and the fact that the most important G20 meetings are closed-door. In 2001, the economist Frances Stewart proposed an Economic Security Council within the United Nations as an alternative to the G20. In such a council, members would be elected by the General Assembly based on their importance to the world economy, and the contribution they are willing to provide to world economic development.