In construction a large company has a handful of multi-million dollar jobs going at all times.
They have a handful of their most productive workers who rose through the ranks to run these jobs.
The large jobs will have 1 or 2 General Foremen and a ratio of about 1 Regular Foreman to every 10 "Peons".
So..the company has lots of data coming in that they can compare the performance of one crew against the other crews with.
To these companies it doesn't matter what color or gender you are ...if you can produce results on a consistent basis they will treat you like THE GOOSE THAT LAYS THE GOLDEN EGGS...and compensate you accordingly.