Payroll and ticket prices have some correlation but they are independent decisions - after all if a team rebuilds, nobody is getting money back. Now, fortunately, fan pressure and owner ego allows the team to spend a lot of money. But it is not a necessary relationship.
The Red Sox themselves are in a special position with very little stadium debt (basically debt from renovations) and the ability to more or less charge any price. Even now, a small reduction in ticket sales is probably offset by any price increases and whatnot.
Ultimately the fans are a bit spoiled - which is fine. And the team, while in first, only has had Sale have an extraordinary season.