The most obvious reason is taxes and complications with the IRS. The current legal immigration and taxation systems have not foreseen that people from other cou

The most obvious reason is taxes and complications with the IRS. The current legal immigration and taxation systems have not foreseen that people from other countries are not living in the U.S. while working in the U.S. The assumption is that once you’re hired by a company in the U.S., you are either working there with a local work permit (for the U.S.), on a work visa, or sent to a different country coming from the U.S. (being either U.S. citizen or having the U.S. residence permit).