It is hereby declared to be the policy of the Congress that adequate funds should be made available to rural electric and telephone systems through direct, insured and guaranteed loans at interest rates which will allow them to achieve the objectives of the Rural Electrification Act of 1936, as amended [7 U.S.C. 901 et seq.], and that such rural electric and telephone systems should be encouraged and assisted to develop their resources and ability to achieve the financial strength needed to enable them to satisfy their credit needs from their own financial organizations and other sources at reasonable rates and terms consistent with the loan applicant’s ability to pay and achievement of the Act’s objectives.