Your wife/children might not be the ultimate and sole beneficiary of life insurance policies since a nominee is considered a mere trustee and not the heir by law. Regardless of who the nominee is, there may be other legal heirs who need to be provided for as per the laws of succession. Also, the family of the deceased may be the last to receive the money, as creditors, if any, may seek a claim upon the Insurance monies to recover any debts which stand outstanding against the deceased.