A pink-collar worker is also a member of the working class who performs in the service industry. They work in positions such as waiters, retail clerks, salespersons, certain unlicensed assistive personnel, and many other positions involving relations with people. 

The term was coined in the late 1970s as a phrase to describe jobs that were typically held by women; now the meaning has changed to encompass all service jobs.


Designation of workers by collar color
https://en.wikipedia.org/wiki/Designation_of_workers_by_collar_color

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Pink Collar Worker: refers to those workers who are employed in low-paid jobs like librarian, receptionist.


List of Collar Workers
https://www.jagranjosh.com/general-knowledge/list-of-collar-workers-1404546729-1

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Pink-Collar Worker - is employed in a job that is traditionally considered to be women�s work and is often low-paid. The term "pink-collar" was popularized in the late 1990s by writer and social critic Louise Kapp Howe especially those who perform jobs in the service industry example: nurses, secretaries, and elementary school teachers.


Types of Collar Workers! (updated)
https://www.linkedin.com/pulse/whats-types-collar-workers-hassan-choughari/

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The term pink colour refers to jobs that are traditionally done by women. The colour pink refers to a colour that is traditionally associated with feminine attributes. This designation does not separate the tasks in this category by education level or manual labour. These jobs include jobs in the beauty industry, nursing, teaching, secretarial work or childcare.