Brussels, March 15 - The leader of the anti-establishment 5-Star Movement (M5S), Beppe Grillo, has made "extremely irresponsible promises", ex-Eurogroup head Jean-Claude Juncker said on Friday. Results from the Italian elections demonstrate a "clear rejection of EU policy" and "a massive rejection of the political class in Italy by Italians who believe in people who pretend to love them but instead are simply cunning," Juncker said. Grillo, whose M5S rocked the political establishment with a stunning show in the elections, has proposed holding a referendum on whether Italy should stay in the eurozone. Juncker criticised Grillo for promising Italians that they could "work 20 hours a week and that all of their problems would be solved by leaving the euro,". "Italians believe in fairytales," he said. He also pointed to ex-premier Silvio Berlusconi's grapple for power by "promising to return taxes imposed by outgoing Premier Mario Monti", if need be out of his own pocket, as indicating Italians' "superficial evaluation" of the political situation.