Now I was never an Al Jefferson hater, but: The Jazz picked him up for nothing, used him for two years, and then exchanged him for a couple of GSW picks. I see that as buying a used car, driving it for a couple of years, and then selling it for more than you paid.
Actually, this is a good example of retaining value. The Jazz got Jefferson for Boozer's trade exception and Koufos and a future first (IIRC). This was a deal KOC was working on with Kahn at the previous deadline. Reportedly, Kahn wanted an additional first and KOC was able to go out and get one.
It was also a valiant effort to retain Deron. Didn't work, of course, as Williams remained noncommittal. So we flipped Boozer for Jefferson, flipped Millsap and Jefferson for Biedrins, RJ and Rush (and picks). Moved Deron for Harris, Favors and picks. Then moved Harris for Marvin. The only failure I see is letting Matthews go. But by almost universal agreement by media and GM's; that was an outrageous contract. It had to be, though. The poison pill that Portland KNEW Utah would not swallow was to go into the luxury tax. Matthews had an ok rookie season. He wasn't worth $9M+ to keep.
I have no doubt Millsap was shopped, as was Jefferson. In fact, I remember a report the year before that the Jazz were trying to get a draft pick for Paul but there were no takers. I'm sure DL would love to trade RJ, MW, Biedrins or Rush. It ain't that easy. Who is available? What contract do we want to take on? Can contenders free up $7.5M or $11M to trade for Jefferson or Williams?
And if the Jazz keep "retaining value" by assuming equal salaries, how do they free up money to give to Favors, Hayward, Burks, Kanter, etc. Eventually some contracts HAVE to be allowed to expire to free up money to pay players as they come off their rookie deals.