They’re Using Their Cell Phones The Entire Time
Flight attendants get a perk all flyers wish they had. Besides getting paid to travel places, they get the Holy Grail of flying: free Wi-Fi and usage of their cellphones. They are often using their phones during the entire flight unbeknownst to the casual flyer.
They may not make the most money in the world, but the do get to travel the globe and get paid for it. Depending on how you look at it, that might not be the worst payoff in the world.