I know most people here would find this drastic, but I agree with you. We already have things like OSHA to regulate workplace safety procedures. We legislate things about break times, overtime, etc.
I think creating a specification that office workers must be given a certain measurable protection against general workplace noise and a certain minimum of private floorspace in which to work, would be quite reasonable.
I wonder if a change.org petition or something would be worthwhile.