The reason this smells funny is because I am not sure how it makes the Sixers better. Even if they got nothing in return, it would only get them $4 million under the cap.
If they were any kind of team, they would try this next season with a worse lottery pick and a more palatable 2 years left on Brand's contract.
Speights, Holiday and Turner would all be on rookie deals, to go with Iggy, Williams (all under 25 years old) and about $25 million in cap space for:
Durant, Anthony, Yao, Hortford, Noah, Perkins, Chandler, M. Gasol, Randolph