Bender's salary would have been under $6 million next season. I still think Bender is hopeless, but keeping him would not have been a ridiculous financial commitment -- far from it.
I was guessing on that, primarily based it on what Jackson's set to make since both were the #4 pick and just a year apart. Apparently the rookie scale jumped a bit because what Jackson's making is quite a bit more than Bender. Jackson's in his 2nd year now and is making $6,041,520 while Bender wasn't even going to make that in his 4th, it would have been $5,896,519. That's quite the difference. I know rookies can sign for up to 125% of the designated rookie scale that's set by the league but I didn't think it would be that much of a difference. I thought the majority of players signed for that 125% amount, that's what I'd read in a few articles about rookie pay in the past, although it wouldn't surprise me to learn that the Suns were able to cheap out on Bender and he just took what was first offered.
Salary info, Bender - https://www.spotrac.com/nba/phoenix-suns/dragan-bender-20209/
Jackson - https://www.spotrac.com/nba/phoenix-suns/josh-jackson-23599/