nairobi south sudan hike fee humanitarians block reach hungry families even oil-rich country appeal nearly billion dollars help avert starvation amid civil war five aid group tell reuters government unite nations announce wednesday south sudan need 1.7 billion aid next year help million people half population cope effect war hunger economic decline aid group say bureaucracy violence rocket government fee stop work despite promise president salva kiir allow unhindered access unite state threaten pull support government october aid workers speak condition anonymity cite fear expulsion country alain noudehou u.n. top humanitarian official country say increase fee major concern take away resources address crisis noudehou humanitarian coordinator u.n. mission south sudan unmiss say wednesday juba announce plan march charge foreign aid worker 10,000 per annual permit late drop revise fee steeply upwards last month however require foreign aid workers pay 4,000 permit 16 time old rate least two aid group pay tell reuters condition anonymity humanitarian affairs minister hussein mar nyout say wednesday receive many complaints new fee restrictions travel aid workers spirit president go implement order president say response question news conference one-third south sudan 12 million population flee home since civil war begin 2013 two years independence sudan unite nations describe violence ethnic cleanse early year pocket country plunge briefly famine economy nosedive hyperinflation government unable pay civil servants soldier oil production collapse official corruption rampant confusion permit delay aid organizations say nobody understand give directives suppose implement say head one international aid group south sudan say customs seize organization equipment despite import tax waiver aid group last week team doctor say deny permission travel outside capital receive work permit pay another aid group say unable bring foreign medical staff complete government-approved project authorities say even consultant visit south sudan week pay 4,000 permit take months obtain first issue inherent absurdity impracticality rule say employee aid group second laws try inconsistently four government agencies loggerheads south sudan expel norwegian refugee council country director last year 28 aid workers kill year nine shoot dead november alone accord unite nations unmiss staff exempt work permit requirement government force contractors pay violation agreement u.n. unmiss spokeswoman say juba honor similar treaty exempt aid agencies receive u.s. fund western diplomat say break south sudan hike fee block aid despite appeal cash