 In 1908, he introduced the Commonwealth Companies Reserve Liabilities Bill, which permitted special reserve funds for banks to assist shareholders during a financial crisis, and in 1910 followed with the similar Commonwealth Banking Companies Reserve Liabilities Bill.He complained of the difficulty of passing private senators' bills, and at the 1913 election he retired, suffering from ill health.Walker maintained an interest in politics after his retirement, and remained a director of the Bank of New South Wales until 1921.