 Complete the following phrase:  The Workers Opposition  was a faction of the Russian Communist Party that emerged in 1920 as a response to the perceived over-bureaucratisation that was occurring in Soviet Russia. They advocated the transfer of national economic management to trade unions. The group was led by Alexander Shlyapnikov, Sergei Medvedev, Alexandra Kollontai and Yuri Lutovinov. It existed until 1922, when it was defeated at the 