The problem with the "not overpay for acquisitions" approach is that in a market where most teams do, and I would say we are in that market because for most trades that happen the immediate response is that one team gave up to much or one team didn't get enough, is that
when you are not willing to overpay you just don't get anything. That's not being prudent. That's going home empty handed.
The spurs did not get Kevin Durant. The thought process was not a big deal they can get somebody else. That somebody else could have been Kristaps. They didn't get him either. Your starting to run out of somebody else's. I am fairly sure that whatever other player they try to get, they will be outbid for that player as well.
Don't see how the Spurs can follow the Pacers model because that involves identifying a young player who has the potential to be a star and trading your best player for him (Sabonis for The Haliban) and giving up 3 first round picks and a good player for your second best player (3 first round picks and bruce brown for Siakam). The Spurs have not come remotely close to making those types of transactions

. The Spurs role players are not on the same planet as the Pacers role players and the Spurs have repeatedly shown they are not willing to do the types of deals it takes aka overpay to acquire said players
But this should not be surprising, because the Spurs have long been an organization that doesn't hold anyone in a position of power accountable for anything. Pop was allowed to have consecutive losing seasons until his body literally failed him with complete impunity, he even received one of the largest contracts in the history of coaching / front office work for it. Brian Wright has been allowed to operate with complete impunity while never once producing a winning season, whiffing on at least half his draft picks if not more, never once signing a free agent who impacted winning all that much, and somehow repeatedly trading for or signing players who are literally out of the league after they leave San Antonio ( Osman ) or go from playing over 20 minutes a game with the the spurs to not even 2 minutes a game with another team (McDermott).
When you don't have to work hard at your job or be successful at your job or get results at your job to keep your job, then why would you do it?