President Ahmadinejad changed almost all of his economic ministers, including oil, industry and economy, since coming to power in 2005. In an interview with Fars News Agency in April 2008, Davoud Danesh Jaafari who acted as minister of economy in Ahmadinejad's cabinet, harshly criticized his economic policy: "During my time, there was no positive attitude towards previous experiences or experienced people and there was no plan for the future. Peripheral issues which were not of dire importance to the nation were given priority. Most of the scientific economic concepts like the effect of liquidity on inflation were put in question." In response to these criticisms, Ahmadinejad accused his minister of not being "a man of justice" and declared that the solution to Iran's economic problem is "the culture of martyrdom". In May 2008, the petroleum minister of Iran admitted that the government illegally invested 2 billion dollars to import petrol in 2007. At Iranian parliament, he also mentioned that he simply followed the president's order.