BP good points you made. 1.. Lower prices all around. 2.. If travellers lost a bit of body weight, then they could up the luggage weight. 3.. Good for shareholders. 4 My answer for 4... Years ago, only the well off could afford to fly. These days every man and his dog wants to fly, even some people on benefits want to fly as cheap as possible, who cares, cram them all into cattle class, they shouldn't be flying anyway:D.