Over 50% US green card holders plan to return home
timesofindia.indiatimes.com
timesofindia.indiatimes.com
Many "work visa holders" BY LAW are supposed to not have intent to immigrate to the United States, or in other words are expected to have intent to return to their countries of citizenship. Until this sample is described more carefully than it is in the submitted article, it's not clear that this is a meaningful finding.