You answered your own question. They move to earn a living.There are plenty of good reason to move to a foreign country for ones business or to work in industry.Tax benefits. The IRS considers work in a foreign country as a family burden and allows one to exclude paying taxes on the first $102,000 of income. **The Foreign Earned Income Exclusion (FEIE, using IRS Form 2555) allows you to exclude a certain amount of your FOREIGN EARNED income from US tax. For tax year 2022 (filing in 2022. the exclusion amount is $102,100.US companies often provides FREE housing, a car, first class airfare and plenty of time off.The unique opportunity to work in a foreign country and u201csee the worldu201d on company money is pretty attractive.In many foreign places living is cheap. One can work for a US company earning $100,000 in China where the average income is $5,200/year. Plus pay no IRS taxes! HmmmOne of my best friends went to Singapore to work in quality control 25 years ago, has worked in Thailand, China, Malaysia and now the Philippines. He said 20 years ago u201c in the US I would need to buy my own car, buy my own house and would earn less than $40,000/yr, I will never come back to the US to worku201d. In Singapore he was earning $70,00, free car and free beautiful home with a pool. In the other countries he earned $90u2013140,000 with everything free, 6 weeks vacation, plenty of holidays and first class airfare to the US and back.Itu2019s a great gig and many Americans do work in foreign countries from teaching English a couple years to working for NGOs for a few years to working in business/industry for many years. Our government too has plenty of jobs available in countries all over the world.