 As minister of economic affairs and employment in the governments of Leszek Miller and Marek Belka, he conceived the so-called Hausner Plan ("Plan Hausnera"), a programme for market-socialist reform concerning state-owned business, public administration, and social security.After his reform met with persistent opposition, he left the SLD in a much debated move on 7 February 2005 and resigned from office on 30 March 2005.From the beginning, Frasyniuk, Hausner and Mazowiecki appealed to Prime Minister Marek Belka to join the party.