Of course the NBA is rigged. There is no hard salary cap.
The luxury tax is a joke even after the new agreement.
A team like the Lakers will continue to sign players regardless of the impact on their luxury tax as the Lakers more than make up for it by winning in LA.
The revenue from winning in LA far outweighs any impact a luxury tax would have on the team.
The new luxury tax looks a lot more punitive against the Lakers.
It may explain why they dumped Lamar Odom, even though I and many others consider him a bargain at $9M. While they might have moved him because he was clearly disgruntled, his cap-friendly contract (and team option) made him a very valuable bargaining chip in any trade talks.
With the old CBA, Odom essentially cost the Lakers $17M for this season from his salary and tax hit. The new CBA ratchets up the luxury tax so you will likely not see the Lakers outspend the competition by $30M/yr because at some point, it will eat into team profits. The Kobe contract become's a hangman's noose in its final 2 years (after this season).
The new luxury tax rules kick in next season:
http://espn.go.com/nba/story/_/page/CBA-111128/how-new-nba-deal-compares-last-one
A couple seasons down the line, if the Lakers maintained their current relative level of payroll, they could pay as much in luxury tax alone as most teams spend on their entire player payroll.