This 1/4 is financed from their contributions. They would continue to receive 3/4 of their salary, out of which they would contribute to the additional part of their retirement pension on which they would draw later. When it suited them, they could move to half retirement or 3/4 retirement, while continuing to retain part of their paid employment.
Il continuerait à percevoir les 3/4 de son salaire, cotisant sur cette part pour la partie supplémentaire de sa retraite qu'il appellerait ultérieurement et il pourrait, aux dates qui lui conviennent, passer à la demi-retraite ou à 3/4 de retraite, continuant à garder une activité salariée partielle.