Eliza, that's another fallacy propounded by the right-wing reactionaries. On my fortnightly visits to the Jobcentre, I rarely come across any Eastern Europeans in there. I do, however, meet them doing hard manual work on the farms around me, working in care homes, cleaning hospitals etc. Also, the Polish population in this area is decreasing as they are now returning home.

You might get a more balanced view from this:

http://www.guardian.co.uk/uk/2009/feb/26/immigration-eastern-europe-jobs