"do you support "euthanasia of economically useless people"? If you don't have a job for whatever reason, should you just be left on the streets to die?"

YES. Old & incompetent people are 'all cost, no benefit' proposition. Children are cost in the beginning, but benefit later on. Saving lives of old and incompetent(lazy, mentally/physically challenged) people is a total waste of resources.

P.S. Just because you don't have a job now, doesn't mean you can't get one in the future or get new skills and work in a different field.

I admire your bluntness, but I have to wonder, do you assume you're not going to grow old and incompetent? Presumably, if we're fortunate enough to live that long, we are all in that boat.

No, because I will kill myself when I get there. I'm doing all the things I want to do before I grow old and incompetent. All the activities you would do when you're old + much more, you can do when you're younger and healthier.

For example, let's say you plan to visit location X when you're old. Well, why not do it when you're younger with the money you would have saved for retirement?