Suggestion: lock and unlock all carry-on bins remotely from the cockpit.
Ah, one more system for the pilots to manage, which adds tens of thousands to the cost of the aircraft, and then fails to release the overhead bins when it should do at the gate. But of course the pax will be patient
Charging for checked baggage makes the carry-on problem worse.
Yup, baggage under should be free, anything carried into the cabin should be charged by the pound, then five times the price per pound for over ten pounds.....