Are people on disability  benefits swinging the lead? - TUC Poverty Conference 2011.

 
 "In fact, fraud is comparatively rare for disability benefits; it is much less common
than the media suggest across all benefits but particularly low for disability
benefits. Statistics published by the DWP show that overpayments due to fraud
accounted for no more than 1.1 per cent of all benefit spending in 2010 – 11. (The
statisticians responsible for the report estimated that between 0.7 and 1.1 per cent
of spending goes to fraud; their best estimate was 0.8 per cent.)

For disability benefits, the figures are even lower: fraud accounted for a smaller
proportion of spending on Disability Living Allowance and Incapacity Benefit than
Income Support, Jobseeker's Allowance, Pension Credit, Housing Benefit, Carer’s
Allowance or Council Tax Benefit. Fraud accounted for just 0.5 per cent of DLA
spending and 0.3 per cent of IB spending."