Lyndon Johnson actually said...
By virtue of the authority vested in me by Section 1035 of Title 10 of the United States Code, as amended by the Act of August 14, 1966, I hereby prescribe that amounts deposited by members of the uniformed services under that Section shall accrue interest at the rate of ten percent per annum, compounded quarterly.
Context
Executive Order 11298—Prescribing the Interest Rate For Deposit of Savings of Members of the Uniformed Services
08/13/1966