The Liberal Democrats have launched an attack on 'supermajority problem councils like Manchester' at their annual conference in Brighton.
They accused Labour-run Manchester of being a 'one-party state' and called for councils to be elected by a single transferrable vote system.
The conference also said all council meetings should be streamed live on the internet.
The 'power for people and communities' motion also pledged to give councillors 'the right to hold service providers to account', strengthen transparency and planning rules and abolish police and crime commissioners.
Liberal Democrat communities spokesperson, Greg Stanton, said: 'Manchester is a textbook case of what happens when a party gets a super majority elected under an outdated electoral system, opposition questions are banned, live-streams mysteriously stop working, contractors are not held to account, decisions made behind closed doors and everyone passes the buck.'
Manchester City Council have been approached for a comment.
