Well, not really. The phrase was specifically about how much value they bring to the company. Market rates have no meaning in this context. E.g. how is "if a team works on a product that no customer seems to use/purchase/pay for, what is the value that team brings to the company" connected to market value? I would say it isn't.

If you want to keep the employee you have to pay market rates or they can easily leave. If the team works on a product that no one wants, that’s the fault of the business side. It’s up to the business to either find something for the tea to work on or let them go.

You’re taking the use of that word too literally. I meant it as what perceived impact would the addition/omission of an engineer of that level have on a company? The stuff that factors into determining annual budgets.

Fair enough, thanks for the clarification.