In spite of the economic need for immigration among developed nations, native workers and the unemployed push back against migration, seeing migrants as contributing to low wages and labour competition. In leaving their homes and social networks, they set out to secure work that is not always available or of the quality they had envisioned. Migrant youth, in particular those immigrating without the proper documentation, are often forced into the informal economy, where they are vulnerable to exploitation by unscrupulous employers.