The purposes of this subchapter are as follows:
(1) to encourage and assist individuals and families in saving funds for the purpose of supporting individuals with disabilities to maintain health, independence, and quality of life; and
(2) to provide secure funding for qualified disability expenses on behalf of designated beneficiaries with disabilities that will supplement, but not supplant, benefits provided through private insurance, the Medicaid program under Title XIX of the Social Security Act, the supplemental security income program under Title XVI of the Social Security Act, the beneficiary's employment, and other sources.