In our society people are acknowledged as human beings through consumption, and that need is hammered onto our heads by ads and beauty norms everywhere.
Belonging is a human need. Sometimes some cheap makeup is all it takes.
But also, the rich people are stealing from us in so much worse ways. A rich teen stealing from a rich corporation is kind of karmaeic, and really, even if she was caught, nothing significant would happen, whilst a poor girl doing the same would suffer a lot more.
Ergo, if you see something, no you didn't.