I'd be fine if small people didn't subsidize large people's seats if you could actually reserve roomier seats based on size. If you're going to allow any random

I'd be fine if small people didn't subsidize large people's seats if you could actually reserve roomier seats based on size. If you're going to allow any random sized person take the roomier seats then you are not pricing based on of pragmatics concerns like $/cubic volume of airplane. In the US we've already decided that this is not an ok reason to discriminate or businesses would be charging people in wheelchairs extra for ramps