In the UK I would certainly say that was true of those from Pakistan (Pakistan anagrams to 'kip Satan' which might be a reason) and India. I have been successfully diagnosed by someone of Chinese extraction. But yes, I think the lure of high salaries attracts the dregs from other countries all too often. I have come across a very nasty piece of work who has been in the UK a long time but originated from Egypt. He works in NHS but has been involved in a pharmacy too with one of his sons as far as I can judge.