It's not just 3k a week though, it's the knock on effects. Others will want the same or even a higher wage, so can lead to the club paying higher wages overall and can also damage the atmosphere within the club.
Friedel only signed a contract extension in June... wouldn't surprise me if Tremmel from Swansea made his way down, safe pair of hands, was back up to Vorm last year and has 1 year left on his contract, would prob be available on a free too. Given both Vorm and Fabianski are ahead of him.