Between 1988 and 1989, Karunanayake worked with
Lalith Athulathmudali, a distant relative; in Athulathmudali's election campaign for his parliamentary seat in the Colombo District for the
1989 general elections. Athulathmudali left the
United National Party and formed the
Democratic United National Front, which was led by his wife
Srimani Athulathmudali after his assassination in April 1993. Srimani along with the 'DUNF-Lalith Front' joined the
People's Alliance under
Chandrika Kumaratunga at the
1994 general elections. In 2017,
The Banker magazine selected Karunanayake as the best finance minister in Asia pacific for securing a $1.5 billion International Monetary Fund loan programme to avoid a balance of payments crisis, replenish reserves and rebuild confidence among international investors. Government revenue grew from Rs. 1205 in 2014 to Rs. 1,461 billion in 2015. Tax revenue rose from Rs. 1,050 billion to Rs. 1,356 billion in the same period which is crucial for Sri Lanka as it has a very low tax revenue-to-gross domestic product ratio. Sri Lanka’s tax records also grew from having 700,000 files in January 2015 to having 1.4 million.
Minister of Foreign Affairs In May 2017 Karunanayake was removed from the post of
Finance Minister and appointed as
Minister of Foreign Affrairs with the Ministerial subject of the Lotteries Board by President
Maithripala Sirisena. He resigned from the post of Minister of Foreign Affrairs on 10 August 2017.
Penthouse Affair In late July 2017, during the Presidential Commission of Inquiry on Bond Issuance appointed to look into the controversial sale of government bonds during the tenure of Central Bank Governor
Arjuna Mahendran to his son-in-law Arjun Aloysius's firm Perpetual Treasuries; a witness, Anika Wijesuriya, stated that the upscale Colombo
penthouse rented by Minister Karunanayake and his family in 2016 was paid for by Arjun Aloysius through his company. Karunanayake was summoned to testify before the Commission, and stated that he had no knowledge of how his rent was paid. This caused a major public outcry, with calls for his resignation and negative feedback to many of the proposals he presented to President Sirisena, such as his request for the use of
Visumpaya as his official residence as Minister of Foreign Affairs. Many within the government, both SLFP and UNP members as well as the President, wanted Karunanayake to resign. He resigned from the post of Minister of Foreign Affrairs on 10 August 2017. In January 2018, a Special Committee of the
United National Party, headed by
Tilak Marapana, recommended that Karunanayake should be removed from his post as Assistant Leader of the party.
Minister of Power, Energy and Business Development Following the
2018 Sri Lankan constitutional crisis, Karunanayake was appointed as
Minister of Power, Energy and Business Development in December 2018. In March 2019, the country faced a major electric power crises with the
Ceylon Electricity Board imposing power cuts. He resigned following the election of President
Gotabaya Rajapaksa in November 2019.
2020 defeat He contested the
2020 Sri Lankan parliamentary election from the United National Party from Colombo, but failed to secure a seat in parliament following the break away of the
Samagi Jana Balawegaya and the landslide victory of the
Sri Lanka Podujana Peramuna. == Policy commentary and advocacy ==