Greek Prime Minister Kyriakos Mitsotakis speaks during an economic board meeting to assess the impact of the U.S. tariffs on the Greek economy, at the Maximos Mansion in Athens, Greece, April 7, 2025.

Poor governance in turn undermines willingness to pay tax, harming state finances. Greece's shadow economy is among the highest in Europe at about 20% of GDP.

The following are comments by European Union Economic Affairs Commissioner Olli Rehn at a news conference on Wednesday, a day before EU leaders meet to discuss aid plans for crisis-hit Greece.