In this day and age in a cap era that kind of thing is pretty much what has to happen to win a Cup and have success. Guys who are on ELC and the like have to develop (like you hope they do in the first place) and outplay and outperform that contract. Then when their deals are up you have to decide who you want to keep and let walk, and have a stable of players ready to do the same thing in the next year or two.
There's no greater evidence of that than the year these guys won the Cup. It was the perfect storm of guys who were outplaying their contracts at the same time but were going to get a raise and we had to let some walk. That was an extreme case of it, but, a case no less.