It will be very interesting to see if the Sixers struggle to retain their players through all of this calculated losing and constant trading, and how they manage to overcome that.
More than all of the losing, I think what players will probably react to is that Philly's out-and-out tank strategy tends to devalue all of the players on their roster. Outside of Philly, nobody on that roster is looked at as a legitimate NBA player aside from the superstar prospects, and any numbers that those guys put up might as well be D-League stats.
I think you can get guys to buy into a long term rebuilding plan, but if you make them feel like any success they enjoy in the meantime will be completely ignored by the rest of the league, they start to worry about their careers.