I don't think our benefits system is being pressured by immigrants to the extent that certain individuals would have you believe:
Bloody immigrants, coming over here and paying our bills | Adam Smith Institute
On another point, the benefit system works reasonably well considering the scale of it. Benefit fraud whilst certainly a problem which needs dealing with, causes only a tiny amount of loss (estimated at 0.7% in 2012-2013). This is from the governments own figures. 0.7% is absolutely tiny as a proportion of the total budget - it really is. So from the governments own figures, it looks like the DWP generally get it right most of the time.
The money lost to underpaid taxes and companies using tax havens and the rest (banking fraud etc etc) is colossal in comparison.
As usual, the government use the benefit fraud thing completely out of proportion and penalise
all those who use it rather than take a measured response to the problem. IDS also blames his own civil servants for the balls-up in Universal Credit. I know someone who works for him and told him UC would not work due to several valid reasons. He didn't listen - none of those idiots listen to their civil servants - they just do what they think will win votes. That is all they give a shi* about. They certainly do not work for the people. My friend also tells me that "In the thick of it" is quite realistic.
On another point, do not believe the persona Boris Johnson shows to the cameras. The reality behind the scenes is very different.