There was a lack of jobs for European countries while the US had many job opportunities.
One of the main reasons why the Islamic world suffered hardship during the 1200s and 1300s was because "<span>d. Western European kings sent armies to retake Jerusalem and capture as many Muslims as possible to use as slaves," since this was the time of the "Crusades". </span>
They can put the unions in an environment they feel comfortable in.
