He made his name as the face of the anti-austerity movement but Yanis Varoufakis, Greece’s rebel economist, is now one of the country’s wealthiest politicians.

After being removed from a left-wing government in which as finance minister he became too radical, Mr Varoufakis wrote a book and built a media and speaking career that has proved so lucrative that he has bank accounts in Switzerland, a property portfolio and a boat.

His income in the past three years was €1 million, his tax returns have shown. Critics accused him of profiting from Greece’s misery and being a champagne socialist.

Mr Varoufakis, 58, who appealed publicly for Greeks to adopt “humble and frugal” lifestyles during the financial crisis, leads MeRA25, an anti-austerity party that won its