The situation isn't even remotely similar. SA was just entering the final 1/3 of the Big Three era, and were compe ive for a le. The next three playoff runs were WCF, Finals, Ring. The cap and tax were also MUCH lower. They literally could not afford to carry a $11M bench player.
Let me ask you this. If they were after Jackson, and I don't believe it, why would Pop get him on the phone while he was still in transit, and tell him there would be no extension? If you want a player, you usually want to keep them, don't you? That's kind of the opposite of what you do to keep a player.