Really? I had no idea thanks for explaining.Nobody plays on their own. Everybody plays with two other linemates.
Most high end players aren't paid as much as these 4. Most teams don't have 4 players in the top 10 cap hits (starting next year), or even 3 of the top 7 or whatever it is this year.Most high-end players have other high-end linemates, and while they could play with lesser players, they usually don't, as it's often not beneficial to the team.
It wouldn't be unreasonable to play them all on two lines if they averaged $8ish. But all >$10? You've got no depth. That's what's not beneficial to the team. And if those players can't elevate the lesser ones around them, they really aren't worth their inflated cap hit.