Free agency and salary cap rules just don't seem to work in the NBA.
Of course, if the Spurs win in 5-6 games, I think teams will start looking at them as a model for how to build a championship team. I'm not talking in the days of Timmy's prime, I'm talking now. Duncan is not a major component of that team's success this year. He contributes, but it is role guys like Green and Leonard and Mills and Diaw who are the difference. Very well constructed team. I am impressed.