When you work for a company, do you never see a correlation between what people are paid and what they contribute? Really?

As for me, I've gone to the boss and said my work XXX was valuable to the company, so I want a raise, and I'd get it. If I hadn't done XXX would I have gotten the raise? Of course not.

(Of course, government and union jobs are different, where your pay is based on seniority, your degree, and job category.)