Translate the following English sentence to French:
"This system restricts employees who want to guarantee a retirement pension for themselves that will give them enough to live on, to make their money available to investment funds, trusts, insurance companies or other private financial groups."
Ce système contraint les salariés qui veulent s'assurer une pension de retraite permettant de vivre à mettre leur argent à la disposition des fonds d'investissement, des trusts, des assurances ou des autres groupes financiers privés.