If 95% of people are overweight, that means each and every flight carries an extra percentage of weight just in passengers. If the average person is 30kg overweight, that's something like 30-40% extra passenger weight. Not only that, the place must also carry extra fuel, which in itself has more weight, so it needs even more fuel. The cost of moving people with obesity rates like we have would add up incredibly fast. All while this is happening, the airlines are still getting only the same income per ticket per person when they should be getting 30-40% more for the average fat. I believe something like an airline, where weight is a huge factor, should be well within their rights to charge more based on weight.