I'm not trying to say that GSW couldn't have figured out how to shed salary otherwise but it seems to me that a deal that (1) gets rid of a player that apparently had fallen out of favor, (2) sheds the necessary contracts, and (3) gets a lightly protected 1st round draft pick is a huge win whether or not Wiggins actually produces anything.GSW picked up a 2021 pick. The 2020 draft is ill regarded.
Generally, ascribing savings to this move is a bit silly, since it was possible to shed the Spellman and Evans contracts otherwise. Spellman was a positive value asset even. Maybe you need to attach a 2nd rounder to Evans. Wiggins himself makes more than Russell does.
OTOH, as some writer noted, there is some cost to making your best player happy. Still, I would have thought that DLo would have been available in the summer at a reduced price. I'll also note that MIN went into luxury tax territory with all of their moves.
This article - https://zonecoverage.com/2020/timberwolves/with-dangelo-russell-glen-taylor-is-letting-gersson-rosas-do-his-thing/ - suggests that new MIN leadership is really trying to be smart about rebuilding the team and is hampered by MIN not being a free agent destination so I guess they are just happy getting rid of Wiggins. Still, giving away what should be a pretty high draft pick doesn't strike me as a smart way of doing business.