Except as otherwise expressly provided, all moneys and funds held by the commissioner of human services and the local social services agencies of the several counties in trust or for the benefit of children with a disability and children who are dependent, neglected, or delinquent, children born to mothers who were not married to the children’s fathers at the times of the conception nor at the births of the children, persons determined to have developmental disability, mental illness, or substance use disorder, or other wards or beneficiaries, under any law, shall be kept in a single fund to be known as the “social welfare fund” which shall be deposited at interest, held, or disbursed as provided in sections 256.89 to 256.92.