1. No, a lot do good hard work (i.e polish people)
2. yes
3. people with criminal records and health problems etc
4. See them back to where they came from and review their living conditions and reasons why they chose to leave (then try to sort those problems perhaps)
I think we need to slow it down and make it harder to come to the UK, but why stop a hard working, 40 year man with no criminal record from coming and working.