What is how pay has been based from the beginning? Market value? If that's what you mean, player's using precedents in the market as part of their negotiation is not a brand new thing. That's been a factor in negotiating all sorts of things since negotiating was invented. But it isn't just "next man up" because there is a talent component too. For example, a journeyman stepping into a starting QB role wouldn't have the same market value as a proven veteran would. That's part of the market for a player as well. And, ultimately, nobody is forcing teams to pay the kind of money they do. If teams are willing to pay it, that's the market.