I wouldn't swap Perk for Bynum. Potential doesn't help the team when it is sitting on the bench in the suit. He has yet to show that he can stay healthy and consistently play at a high level to help his team. Even Big Baby with that significant girth and height disadvantage has had a more productive playoff career than Bynum.
And Garnett's 13/7 makes him worth every penny.
First of all just because someone else is potentially being overpaid out there doesn't make an overpaid player on your team any less overpaid. And 2nd did you just try to compare KG to Bynum?
At this point in time, Bynum's a better player. That's not exactly saying much because he's much younger. Dwight Howard is better than Shaq right now, but obviously Shaq's legacy and historical standing is much greater.
The Lakers are paying a lot for Bynum, but it's likely he would have gotten more on the open market (he was due to become a restricted FA). And considering what the Blazers are paying for Aldridge, and what the Warriors are paying for Biedrins, I think the Lakers got a fair deal for Bynum. The 4th and final year is a team option.
Back to Marc Gasol, he's clearly a player on the rise. Jefferson is struggling coming back from surgery, and it's tough to learn the triangle system that Rambis is running. The league is filled with individual talents that can put up numbers with minutes and opportunities. The challenge is for the GMs to find the right pieces to fit around them. They need to have a system in place, find the guys that fit into a system, and develop chemistry. The Hawks have done a great job doing this over the past few years.