No, this is too often completely wrong. Having utility is only half the battle, you also need leverage to withdraw in proportion to that utility. If the customers all know about the problem and your product, but your company has a near monopoly, the salesmen can position themselves as middlemen where the entire transaction flows past them, and they'll siphon off some nice round number - say 10% - completely disconnected from the minimal or even negative value they contributed to the process. Conversely, the engineers can find themselves completely powerless to negotiate compensation, producing value to the company 10x or 20x their salary, out of view of the customers and with no leverage to extract any more or less from the process.
> ‘Go where the rich and powerful are,’ I’d tell him, ‘and learn their ways. They can be flattered and they can be scared. Please them enormously or scare them enormously, and one moonless night they will put their fingers to their lips, warning you not to make a sound. And they will lead you through the dark to the widest, deepest river of wealth ever known to man. You’ll be shown your place on the riverbank, and handed a bucket all your own. Slurp as much as you want, but try to keep the racket of your slurping down. A poor man might hear.’
Kurt Vonnegut, "God Bless You, Mr. Rosewater"
https://www.goodreads.com/work/quotes/4076-god-bless-you-mr-...