In the 1800s, many immigrants came to the united states because of push factors such as

Economic hardship and religious and political persecution were the main motives for most immigrants coming to the United States of America in the 1800s.

Explanation:

Most immigrants escaped from poverty, crop failure, famine, land scarcity, labor shortages, unemploment and lack of economic opportunities. They saw America as a land of opportunity and so far, many newly-arrived continue to think of the US in such terms. However, many immigrants also escaped from political and religious persecution and repression.

if you are talking about current time the answer is no

if you are talking about when the colonies were developing the answer is yes

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.