A quarter of the country's State-funded hospitals and health agencies are breaking rules on paying their top executives.
New figures show some senior staff in disability and maternity services are getting packages worth more than €200,000 a year.
Figures released by the Department of Health show that salaries are made up of HSE-funded payments and topped up with funds from private sources such as the proceeds of the on-site shops and parking.
Salary top-ups are also back in the spotlight today.
Figures show the Masters of the Rotunda and the National Maternity Hospital are being paid separate, privately-funded allowances worth €20,000 and €45,000 respectively.