I guess, but for every underpaid Pippen there is, isn't there an overpaid Mozgov (yeah..I get it...different times, but he's the first who came to mind). I don't think he offered to give money back (nor did Luol Deng).
To me, if any players should get deals redone (if any should) it's NFL guys who can be dumped if they don't produce.
NFL guys have the worst contracts. If there's any sport that needs fully guaranteed contracts, it's that one.
Don't see it happening though because their union is weak.