For my services, the Govt pays my employer 4 times what my employer pays me.
The woman I share an office with makes 1/3 more than I do for the same position. However, she's been with the company for 30 years and I have 4 years.
These facts were unknown to me when I accepted the position.

As Cav posted, I get paid exactly what I was told I would be paid when I took the job - plus annual raises.