If this was true, poverty rates should remain steady without regard to social programs. Research that. I think you will find you are empirically incorrect.
Man will find a way to screw them over. After all, someone's going to be a lot poorer cause they ain't cranking out jet fighters or bullets any more. They aren't going to take that sitting down.
There will always be "poor"...always. Why? Because there always has been poor. And I'd be willing to bet that in every instance, other people put them in that spot in some fashion. You think that is going to change?
You have a lot more faith in your fellow man than I do. You, like I...cannot be trusted to always and forever do the right thing.