Sorry but it is, it's mainly circumstantial, however, I have experience of a fair few companies purposely seeking out people whose English is very basic, for no other reason of exploiting them in work. Not that excludes British people either...
Also upto several years ago you could not get 2 calls into any phone on immigration, before some company owner would boast about using a recruiting company anywhere but the UK, because British people are fickle because British people are lazy, British people know there rights...
Freedom of movement has been abused. It used to drive me because I knew where this was leading...
I don't doubt that there are organisations that abuse it, but we shouldn't blame the victims of that abuse but the culprits.
- the only criticisms I noticed were from leave voters, not really spotted any from remain voters, hence the question