Shahid Hafiz Kardar, governor of the State Bank of Pakistan, is seen during an interview in his office in Karachi April 4, 2011. Pakistan's economy has shown signs of improvement but quick steps are needed to broaden the tax base to benefit from the growth in untaxed sectors, such as agriculture, the country's central bank governor said on Monday. To match Interview PAKISTAN-CENTRALBANK/ REUTERS/Akhtar Soomro (PAKISTAN - Tags: BUSINESS)