NBA free agency opens tomorrow, meaning teams will take meetings with whichever players they think they have chances of signing. Not every team which hosts free agents have the ability to sign them outright. They need help, and the Sixers can provide it.
So it's only fair, on the eve of NBA free agency, to look into the potential trades Philadelphia may make to get better players or future draft picks while using almost just their cap space. Because NBA trades require something being sent out by both sides, the Sixers will have to give up "something" in every salary dump trade.