They don't get jobs as flight attendants. If you already work in an industry that mandates make up use, and you're doing it tough, shoplifting make up seems like a smarter financial choice than getting fired over a lack of make up and having to find work in an entirely new industry.

As someone who currently doesn't even own a single article of make up (unless you count tinted zinc), yes, you can get by without it, but not everyone can, and loosing your job over other when you're already struggling financially isn't ideal.