"They remain treated as temporary migrants and, without that piece of paper, some form of identification, they are not able to access many of these government schemes that exist now, that have large funds behind them and could actually make a huge difference in poor people's lives,"

VOA: standard.2009.09.24

Without migrants some businesses, especially farming, could have become more productive through mechanisation.

ECONOMIST: Migration

Migrants without an urban hukou spend 30% less than otherwise similar urban residents, according to research by Binkai Chen of the Central University of Finance and Economics, Ming Lu of Fudan University and Ninghua Zhong of Hong Kong University of Science and Technology.

ECONOMIST: Chinese consumption is about much more than shopping

The number of visas issued to skilled non-EU migrants without job offers - known as tier 1 - would be cut by 13, 000 to 1, 000, and the corresponding number of visas issued to those with job offers - known as tier 2 - would increase by 7, 000 to 20, 700, Mrs May explained.

BBC: May unveils plan to reduce non-EU immigration