Is Call of Duty's Perk System Broken?

Keith @ gamingvice.net writes:

"I am not sure how I can effectively say the point I am trying to get across with this question. I have played my fair share of the past two Call of Duty games and both are done quite well. The biggest addition in COD4 as we all know was the ability to create custom classes, but I feel the "Perk System" is a bit unbalanced, and at times I wonder why the system is even in place."