It is hereby further declared as a matter of legislative determination that high interest rates are contributing to rising costs of health care, that techniques of financing health care facilities have changed, that existing financing documents may impose unnecessary burdens, and that the giving of power to hospital authorities created pursuant to sections 23-3579 to 23-35,120 to refinance existing indebtedness and to utilize improved financing techniques would serve the public interest by improving the quality of health care or minimizing the cost thereof.