for starters, no, it didn't "begin" with him buying the team. It just became more obvious with a media that pointed it out a lot more than it did before.
Also, there are restrictions to being in the lux tax, where it hamstrings your ability even more so than most fans realize. This means they can sign a free agent (MLE I believe) easier than they could before that.
Also, honestly, we have fans who bitch about Neil signing Turner, Meyers and Moe (I never liked those signings, only liking maybe Moe), but then bitch when no other team wants to take those contracts. Damned if you do, damned if you don't I guess.
Doesn't this kind of trade make it easier, financially, for them to re-sign Ed and Shabazz? Since they won't be paying the repeater tax?
Somehow, and I know I'm going out on a limb here, I think the team understands the ins and outs of the CBA and what implications come from being a repeat lux tax spender.