stylistic:tone, structural:scholar_edition, information:classification
Influence and accountability

The G20's prominent membership gives it a strong input on global policy despite lacking any formal ability to enforce rules. There are disputes over the legitimacy of the G20, and criticisms of its organisation and the efficacy of its declarations.

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.

The cost and extent of summit-related security is often a contentious issue in the hosting country, and G20 summits have attracted protesters from a variety of backgrounds, including information activists, opponents of fractional-reserve banking and anti-capitalists. In 2010, the Toronto G20 summit sparked mass protests and rioting, leading to the largest mass arrest in Canada's history.