It is hereby declared to be the policy of this State that competitive employment in an integrated setting shall be considered its first and priority option when offering or providing services to persons with disabilities who are of working age. All state agencies that provide services and support to persons with disabilities shall follow this policy and ensure that it is effectively implemented in their programs and services. Nothing in this subchapter shall be construed to limit or disallow any disability benefits to which a person with a disability who is unable to be employed as contemplated by this subchapter would otherwise be entitled. Nothing in this subchapter shall be construed to require any employer to give preference to hiring persons with disabilities.