Permissibility of signing everything over to ones wife

AssalamuAlaikum Muftisaab. May Allah reward you for the good work that you are doing.I work for a company which offers a provident fund, life insurance and medical aid as part of the benefits. All of these benefits are compulsory. I am married have no children, have two brothers and two sisters. With regard to the provident fund and life insurance will the laws of inheritance apply or can I make my wife the beneficiary of everything if something were to happen to me?