re: I like my idea
There could be some serious issues with fire propagation with your idea. Those holes with poles would provide an avenue for fire and smoke to spread between floors. You might be able it mitigate that by putting the holes in closets so they can be blocked off if necessary, but I suspect the fire marshalls would have trouble accepting the idea. It doesn't do much good for the handicapped, either, but then, neither do stairwells.