Remember the 70's SF film, Soylent Green? Aside from the feeding people with people plot, it also was quite prescient about a number of looming problems: global warming, over-population, the merger of government/corporations/media. And euthanasia. In the film there were official centers where people went, and after passing the psyc tests, were given a drug cocktail and assisted "on their way".
Now we're nowhere near that point. But in the years to come, as supporting its citizens gets more costly-in money and more importantly resources, governments will certainly consider it. Watch how the media will begin doing more favorable coverage of the issue.