There were a lack of proper Criminal Records Bureau checks on some staff who work with children, especially agency staff and foreign workers.

BBC: NEWS | UK | Children in care 'being failed'

But many make the same argument against legal foreign workers, especially in the fields of computers and engineering.

NPR: Critics: High-Tech Visas Cheat U.S. Workers

Just a few years ago, a claim like that one could be dismissed as overly premature or alarmist, but a number of legal and social developments are rapidly changing the labor landscape in China, especially for workers employed in foreign enterprises.

FORBES: Chinese Labor's New Muscle

Another trend picked up by the Labour Force Survey is that newly entering foreign workers are getting younger, especially those from Europe.

ECONOMIST: Employment

Many of today's union members -- especially in rust belt states like Ohio, Michigan, Pennsylvania, etc -- still see foreign workers the same way that previous generations of union members saw them: as competition and a barrier to higher wages.

CNN: Gay rights, immigration reform on collision course