The shocking extent of fraud in the National Disability Insurance Scheme (NDIS) has been laid bare with accusations of coercion, criminal gangs and more than $3.5 billion of tainted funds.A parliamentary inquiry investigating how widespread fraud is within the NDIS has found that an estimated 8 per cent of the $45 billion scheme has been tainted by fraud.The NDIS works by pairing a person with a disability with one of the 1400 plan managers, who provides them with the support