Did you ever read Tim Donahy's book? Might want to check it out.
No but I know the jist of it. He hardly alluded to a conspiracy. He covered
spreads by knowing the tendencies and biases of officials for/against particular players, teams, coaches, home, and away. Conspiracy by the league was just knowing where to send what crews where.
I don't really doubt that there's something to that. However, teams earn their place in the pecking order. It's also worth noting that basketball is one of the hardest to call sports (but I know that doesn't stop the NCAA from calling MUCH better games).
Better teams win more games than worse teams. The argument posed, by extension, is saying the Wizards or Bobcats might be as good or better than most NBA teams. Or that the Timberwolves were anything other than a joke all of this time. That's just not the case.
Someone will also have to explain to me the particular interest the NBA would have in a team like San Antonio being one of the most successful teams in the history of the league. I'm not saying they're a small-market, but they're not a big one. On that note, a really big reason the premier markets in the NBA have the lion's share of titles is because they got into the league earlier (thus developing a tradition and deep-rooted resources) and players tend to migrate to those markets. Let's not forget that Lu Alcindor forced his way out of Milwaukee (after winning it all there) to the Lakers.
Synopsis: I'm not saying there isn't an obvious inequity in how things in this league works. I'm just saying that the system is far from perfect but that being good at basketball is STILL ultimately the heart of the matter.