Question

should people who are a burden be euthanized to spare both themselves, and others because they are a waste of time and tax dollars?

Answer 1

Logistically​ it makes sense, but there are obviously serious moral conflicts. Is the increase in productivity worth their lives?
Compare the pros with the cons, and see which is better. Because morality is subjective, there is no one answer to the question, so answer it however you like so long as you also say why.
Hope that helps!