South Sudan is the most expensive country in the world for expats in 2016 due to the extremely high cost of maintaining a secure, expatriate style, standard of living and importing goods in the world’s newest country. The economy of South Sudan is one of the world’s weakest and most underdeveloped with little existing infrastructure.
In Venezuela, rampant inflation, product shortages and tight government controls on foreign exchange have kept it at or near the top of the list for many years, in second position in 2016, of the most expensive countries globally.
Oil-rich Angola has dropped two places, having been the most expensive country in the world for expatriates in 2015, to become the third most expensive country in the world for expats in 2016 due primarily to the drop in the price of oil, the resultant economic slow-down.
Switzerland is the fourth most expensive country followed by Norway which has dropped two places and is now the fifth most expensive country for expatriates.
http://www.xpatulator.com/cost-of-living-article/Country-Expat-Cost-of-Living-Comparison-Rankings-April-2016_668.cfm