Zimbabwe is the most expensive country for Expatriates to live in due to the current economic crisis. Hong Kong is the second most expensive country due to the very high cost of housing and healthcare. Singapore is the third most expensive country. Singapore’s education system, which is widely regarded as the best in the world, is also the most expensive for expatriates when priced in US Dollars.

https://www.xpatulator.com/cost-of-living-article/The-Most-Expensive-Countries-in-the-World-for-Expatriate-Professional-Migrants_717.cfm