Delhi Chief Minister Arvind Kejriwal today pleaded with the Centre not to impede his government's attempts to ensure that the people get their monthly ration at their doorsteps. He said his administration's sole aim was to neutralise through this innovative scheme the mafia that operates in the city. He claimed he himself did not want any credit from it. The state's flagship plan hit a roadblock just days before its launch on March 25, with the Union government saying subsidised foodgrain allotted to Delhi under the National Food Security Act cannot be used for it.