CP, there's no question that the Spurs are a well run franchise. If there was a system for building a culture where all-stars want to stay with your franchise for less money than they can make elsewhere, though, every single team in the NBA would be doing it.
The Spurs were not patient when they were bad. The Spurs were patient when they were good. They were disciplined about maintaining their success by paying extra attention to overachieving international prospects instead of underachieving ncaa prospects and high profile square-peg free agents. We can admire them for that, sure, but when you are on top, you have the luxury of making low-risk-low-reward-moves. It's not difficult to be disciplined when (a) you're already a top team, and (b) your stars are both aging gracefully and somehow not interested in money.
But yeah, let's be smart!