The State pension in Belgium is under great strain. A supplement in addition to their State pension is therefore essential for a large number of your staff; it will enable them to maintain their standard of living.
You can give them a helping hand with Pension@work. You then pay a monthly premium into a pension fund for your staff. They will then have a supplementary income when they reach retirement age. If they die before they reach that age, the capital will be paid to their heirs.