Salon workers describe a culture of subservience that extends far beyond the pampering of customers. Tips or wages are often skimmed or never delivered, or deducted as punishment for things like spilled bottles of polish. At her Harlem salon, Ms. Cacho said she and her colleagues had to buy new clothes in whatever color the manager decided was fashionable that week. Cameras are regularly hidden in salons, piping live feeds directly to owners’ smartphones and tablets.

Qing Lin, 47, a manicurist who has worked on the Upper East Side for the last 10 years, still gets emotional when recounting the time a splash of nail polish remover marred a customer’s patent Prada sandals. When the woman demanded compensation, the $270 her boss pressed into the woman’s hand came out of the manicurist’s pay. Ms. Lin was asked not to return.

“I am worth less than a shoe,” she said.

Sarah Maslin Nir, in The New York Times, on the low wages and abuse suffered by manicurists.

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