Originally Posted by
bocastephen
Then the right answer may be requiring narrow body aircraft to be 3x2 instead of 3x3, enabling wider seats and wider aisles.
This will be a case of "be careful what you ask for - you may just get it." This won't happen in a vacuum and reducing available seats on the aircraft by 17% (or more if you also require a bigger seat pitch too) is going to result in higher fares and make air travel unaffordable for a significant portion of the population. Low Cost/Budget Carriers may well cease to exist as their operating model won't be sustainable.