It will all be dressed up with the best possible motives behind it and sold to the public as the ultimate benefit. The killings, uh, terminations, will take place out of sight so as not to disturb the masses who might have a few embers of a past morality still burning in their souls. People will sign documents testifying to their desire to die, and the government will see it as a means of "reducing the surplus population," to quote Charles Dickens.
When life is seen as having ultimate value, individuals and their doctors can make decisions about treatment that are in the best interests of patients. But when government is looking to cut costs as the highest good and offers to pay doctors to tell patients during their annual visits that they can choose to end their lives rather than continue treatment, that is more than the proverbial camel's nose under the tent. That is the next step on the way to physician-assisted suicide and, if not stopped, government-mandated euthanasia.
It can't happen here? Based on what standard? Yes it can happen in America, and it will if the new Republican class in Congress doesn't stop it.