[c0vfefe]

It's very hard to quantify the marginal business value given by a single employee, especially if they're just starting in the position.

Economics is driven by scarcity - supply and demand. Companies have no financial incentive to pay us any more than it would take to hire a replacement. They're in the business of making profit, which necessarily means paying people less than the business value they add, and if a company wants to be very profitable, the only way is to pay substantially less than the value received.

So even if you pitch based on value add, you're really just signaling that you have top skills which are in short supply, and they'd better pay you more or else some other company will. They have no obligation or incentive to pay commensurate with value add, only to pay just enough to keep getting the value add.