As deputy minister of finance, Tseng commented on the amendment to raise the tax and health and welfare surcharge on tobacco in early May 2013. He stated that the move would result in a loss of NT$610 million in
tax revenue but it will bring in an extra NT$25 billion in income used for health and welfare funds. He was named the Chairperson of the
Financial Supervisory Commission of the
Executive Yuan on 1 August 2013. Tseng was elected to the
Legislative Yuan through the proportional representation ballot in 2016, as a member of the
Kuomintang. Prior to the election, he was an independent. ==References==