Here it is from: http://hoopedia.nba.com/index.php?title ... _Agreement
"The maximum annual increases in multi-year player contracts will be reduced from 12.5 percent for a team’s own players and 10 percent for other players to 10.5 percent and 8 percent."
They also have a 6 year maximum. Some of our rules are slightly different but I believe Kal wanted to avoid the situation where owners build a gigantic mess going into the future and then quit on that team.
NBA teams are less likely to make that mess because it is real money and you can't just quit on a team, you have to sell it.