At my previous place of employment, I was hired on as an employee with experience but no formal education. Hired at the same time as myself was a woman with a degree but no experience. Our pay rate was the same.
I would later learn that I making a tiny bit more than a woman that had 2 degrees- and had been with the company for 8 years.
Hired not long after me was a woman with no experience and poor work habits. She was hired on for 10% higher than my own pay rate.
It was a corporately owned company so my immediate supervisors declared themselves at the whim of their overlords and therefor bereft of power over the matter.
After two years of employment, I was given a glowing annual performance review- and an annual raise of $0.17 an hour.
I informed my manager as to which area of the building I was assigned to that day because I no longer worked for them and she was going to need to do it herself.