I think the best solution is to have the state look away when children take care of their elderly parents. I do not think euthanasia is inherently immoral. Paradoxically, involuntary euthanasia is less dangerous to religion than voluntary euthanasia. After all, most religions fear people committing suicide in order to get in Heaven, and that is why suicide is generally expressly forbidden. My religion is the most lenient on euthanasia of all religions.