I can't really respond very well to a string of non-sequiturs such as you have offered, except to say that there have been a few persons of note who were completely unable to feed themselves, and no one suggested that they didn't deserve to live. And if their caregivers had refused them care, charges would certainly have been brought against them.
For example, Christopher Reeve. Would you have wanted his caregiver to walk away from him with a shrug and a "Feed yourself, Superman!" Or Stephen Hawking's, with toss of the hair and a "Figure it out for yourself, genius!"
Of course not. And we are talking here about people who are charged with the care of the incapacitated person, not strangers in the street. We aren't talking, as you seem to be, about some abstract world hunger guilt trip.
Finally, you ask me to justify Africa, North Korea and Somalia: Sorry, please direct your questions to Robert Mugabe, Abshir Farah Hassan, and Kim Jong Il.