That appears to be turning into another popular misconception. Mrs CK's BFF (to use current terminology) is in a north central england job centre. The %age of non-UK national "clients" (not allowed to call them claimants any more) is now approaching the halfway mark.
Yes there are plenty of Uk nationals that could do with a boot up the "harris" but to paint it as simplistically as incumbents sponging off the state is, as I say, a misconception.
Were it only 2.5 million on dole then manageable, you forgetting the other 4.5 million on all the other benefits.
In certain areas I agree East European immigrants may end up on welfare and collecting but knowing many many Poles I know very few who wish to live off the state or are in anyway inclined to do so.