" it's not just foreigners who treat people like this in their own country and then come over here and do it. There are a lot of British people who do this here too. Many are expats who have lived in places where it's normal to have domestic workers."

I don't have any statistics, but some of my eastern European friends were subject to abuse by some British families, unlike these poor workers, they knew how to react and where/whom to complain to.