I'd consider Fat Al for Okafur and a (future) protected 1st, if and only if Okafur has no problem coming off the bench. Okafur plays just 22 minutes a night but he is a starter. He has one more year on his contract.
The Wiz do it because they're terrible offensively and truly need something in that regard. They could play Al at the 4 with Nene at the 5, they'd have Al's Bird Rights, and free up money a year early. Yes, they'd give up a 1st but it could be top 9 protected this year, top 10 next year, top 11, and then unprotected...or something like that to where it would far from kill them.
We do it to free up time for Favors and Kanter. Favors could play another 6-7 minutes a game, and Kanter another 3. We'd also improve on the defensive end by swapping guys. Additionally, we'd get a protected 1st out of it. I suppose it could really hurt us in re-signing certain players like Millsap, Marvin, and so on so I'm not sure I'd do it because of that but this may be something we want to pursue.