Your interpretation of the US Supreme Court decisions is a bit overreaching.  The Court said that a state is free to override the liberty interest in a patient ending his own life.  They did not say a state had to do so, much less that it should do so.  The Hippocratic oath also bars abortion.  Let's face it, it is thousands of years out of date.  While I would hope we as a society would eliminate fear of cost from a patient's calculus, free people should be free to make decisions based on all the factors that they face.  Your 5th reason makes no sense at all.  Government is involved in the decision whether it is by prohibiting end of life decisions by the patient or allowing them.