Earlier quoted context omitted.
Yeah you get paid the average cost of having that work done , not the average value at all . That may well be 10x what you're paid for the work, in some positions.
The surplus value wasn't provided by you though, the people who built the company added it. I know that I wouldn't make enough contributions to warrant my current salary if I worked for most other companies than the one I work for now, so they actually give me more money than the value I bring. Sounds like a pretty good deal to me.
[EDIT] point remains, your wage is the cost of having that work done by labor in the market, unrelated to the value (return on investment, say) it provides, except that same value puts a de facto cap on the wage. If capital can get a 10% return paying $20/hr, they'll do it. If they could find a way to do the exact same thing but pay $10/hr, they would. "Value" remains constant.