It would be insanity to insert legal assisted suicide into a culture in which the lives are people with disabilities, especially those of the elderly suffering from dementia, are widely considered not worth living.
Check out the following two articles.
http://nymag.com/news/features/parent-health-care-2012-5/index6.html In this article the son of a mother who is old and demented laments her continued existence. She may or may not have been overtreated at the beginning of her slide into dependency, but she is not being treated at all now, and he still wishes her dead. Again and again he cites costs to the taxpayer as one of his reasons, forgetting that Medicare is an insurance program that one pays into when one is well so that it is available when needed.
http://notdeadyetnewscommentary.blogspot.com/2012/06/diane-colemans-plenary-remarks-at-adv.html This article is about undertreatment as experienced by people with disabilities. They hear that their lives are not worth living and should be ended. So do surrogates, who, sadly, are often willing accomplices in denial of potentially life saving medical treatment.