Mary Lou McDonald (Dublin Central, Sinn Fein) | Oireachtas source

I understand that the other Mr. O'Brien, Mr. Tony O'Brien, stated in his opening statement: "Due to the challenges posed by the legacy payroll systems predating the HSE, it has been difficult to quantify with precision the exact number of staff and costs associated to individual allowances". I read from that there is an issue around the payroll systems.