Answer:
I think the other Merry Maids workers are likely more used to how other treat them because of their experience with it, but that doesn’t mean it doesn’t bother them. They are likely fed up with it as well, but they almost have no other choice during their stops at a convenience store for lunch and their limited wardrobe supply other than their uniforms. It must be degrading and aggravating to these women as well, but perhaps more so for Ehrenreich because she is not accustomed to these kinds of reactions due to her social location.