"Overpayments happen when a carer breaches a government-imposed cap which states they cannot earn more than £151 a week in a paid job while receiving the £81.90 allowance. Instead of asking carers to pay back the amount that exceeded the threshold, the DWP claws back the whole £81.90 for each week that was in breach."
This is so obviously a scam that it explains the DWP's reluctance to either release the report or change the system to ensure justice for carers.