Greece will need to tap all the remaining cash reserves across its public sector — a total of 2 billion euros ($2.16 billion) — to pay civil service wages and pensions at the end of the month, according to finance ministry officials. Barring a last-ditch deal with its creditors, that is likely to leave no money to repay the International Monetary Fund almost 1 billion euros due in the first half of May, although Greece has said it wants to honor its debt obligations.