While this has seen a concurrent growth in fraud in cash terms, the level of fraud as a proportion of the size of the benefits bill has actually remained fairly constant between 0.6% and 0.8% in the past five years, and actually fell in the most recent year.However, they base their analysis on the DWP figures, which are certainly understated.
The true cash figure for benefit fraud is likely to be close to £6bn.
This takes no account of the huge costs of social housing fraud.
And as Fraud Central point out:
Benefit Fraudsters not only affect Social Security benefits, they can have free prescriptions, free eye tests and free dental treatment costing the NHS millions of pounds per year.