Well, either they are or they're not, have you decided yet?
You do realise it was a completely different world in the early 80s? There weren't any handouts or help at all, no financial draw other than a healthy economy in the UK. Either they "contributed positively" or they'd be dead from starvation.
And this is what I dislike about people like you, my parents worked their fingers to the bone, not taking a single hand out, both worked 6 sometimes 7 days a week but found time to be parents to two small kids. Installed conservative values of working hard and studying hard to get yourself higher in life. And people like you can't tell the difference between real proper immigrants who wanted to integrate into this country and the hoards of useless, crime-riddled layabouts who want to install their countrys cultures over here and the rest of Europe. You can forgive me if I take your stance as a complete and utter joke because you fail to understand basic human nature
And I think because of my unique position as child of immigrants, I think I know a **** load more about the right kind of immigration that should come into this country than you!