There doesn't appear to be any consideration given to the logistics of implementing this. The UK low cost airlines are penalising passengers who don't do online check in but want to check in at the airport. It saves them staff manning the check in desks. If you implement a weight system how does it work? Do people estimate their weight when booking and pay accordingly, then at check in it's a weigh in and you pay more or get refunded dependant on your weight on the day? How many extra staff involved in doing this and what does it then do to check in queues? OK for a tiny airline like Samoan Air but imagine if Emirates tried it
