Greece needs more than €60bn in new financial help over the next three years and faces decades under a daunting mountain of debt that will make it vulnerable to future crises, the International Monetary Fund has warned. In a new analysis that lays out Greece’s economic dilemma in stark terms, the IMF on Thursday called for Europe to grant the country “comprehensive” debt relief, arguing for the doubling of the maturities on its debts from 20 to 40 years.