It's obviously a salary dump. The question is why. Here's my math.
Scenario 1: If they traded for Oladipo and Turner while sending out Langford, Hayward, and the rights to Payton Pritchard, they'd be under the luxury tax line just enough to offer a little more than a minimum contract to fill out the 14th roster spot.
Scenario 2: If they traded Hayward for Turner and McDermott, they'd be under the luxury tax enough to offer the full MLE to fill out another roster spot. The problem is that they'd already have 15 players. More trades would be needed.