Check out the article, at the following link. It's the reason why Southwest makes a profit every year...and why it's employees remain so loyal to it, and their customers....as opposed to Northwest's views on it's employees...Why Northwest has to monetarily rape it's employee's and abuse it's customers to make a profit....
http://www.star-telegram.com/business/story/391779.html
http://www.star-telegram.com/business/story/391779.html