As Foreign Affairs Minister of the Hellenic Republic he visited numerous European countries, to explain the effectiveness of the reforms taking place in Greece and the investment opportunities in the country. During his public engagements, he also made a number of proposals about the establishment of new international instruments to tackle economic inequalities and to generate funds for economic development projects, such as the financial transactions tax, and new political and economic governance instruments that would make the European Union more united, in order to be able to prevent and tackle more effectively future financial crises.