Mushroom.
'They' can't be both 'dole dossing scum' and 'undercutters' (ie working) at the same time.
This is the problem whenever there's a discussion like this: people stereotype. Now I know we all do it, often in the lighthearted way you refer to later in your post- thick Irish, tight Scots, sheep-shagging Welsh, arrogant English. But it gets a bit more important when people take it seriously and use it against easily identifiable minorities.
Treat people as individuals.
If there's troublemakers lets sort them, whether they're locals or immigrants. The problem isn't the immigran