As others mentioned this only works if we assume no seat classes and people not flying in groups. First class, golden carpet diamond supreme customers won't to

As others mentioned this only works if we assume no seat classes and people not flying in groups. First class, golden carpet diamond supreme customers won't tolerate waiting for someone from the back of the plane to exit. Their head would explode probably and they'll vow to never fly that airline. But overall the problem is that people fly in groups and they like to sit together. Sending the kid out while the parent waits for the next column to deplane will never happen. Should the people in groups wait then, but a good part of the plane will just stay waiting and it's back to the existing algorithm anyway.