A bill to amend the Social Security Act to provide that the Secretary of Health, Education, and Welfare (in the case of the old-age, survivors, and disability insurance program or the medicare program) or the appropriate State agency (in the case of any of the public assistance or medicaid programs) shall be liable for attorney's fees incurred by an individual in successfully challenging a decision which denies him the benefits or assistance, or reduces or limits the benefits or assistance, to which he is entitled under such program.