Originally Posted by Boggie Dog

A rehearsed movie scene where everyone knows their steps doesn't represent reality. The airlines will balk at any system taking space from available storage, there's no additional storage that can be created. The number of flight attendants are specified per FAA regulations. I doubt the airlines make a habit of flying excess crew just for the heck of it.

14 CFR § 121.391 - Flight attendants.

(a) Except as specified in § 121.393 and § 121.394, each certificate holder must provide at least the following flight attendants on board each passenger-carrying airplane when passengers are on board:

(1) For airplanes having a maximum payload capacity of more than 7,500 pounds and having a seating capacity of more than 9 but less than 51 passengers - one flight attendant.

(2) For airplanes having a maximum payload capacity of 7,500 pounds or less and having a seating capacity of more than 19 but less than 51 passengers - one flight attendant.

(3) For airplanes having a seating capacity of more than 50 but less than 101 passengers - two flight attendants.

(4) For airplanes having a seating capacity of more than 100 passengers - two flight attendants plus one additional flight attendant for each unit (or part of a unit) of 50 passenger seats above a seating capacity of 100 passengers.