NBA just signed a new TV-deal which raised the cap and salary floor, it has nothing to do with what's happening in BB. In NBA's case, it was the increased income that led to the increased spending. In BB, the prices have gone way up, while income remains the same.
I've said it before, the problem is the training system and it was bound to eventually catch up to us. It's impossible to produce enough players to fill out a full roster, so good players will keep getting rarer compared to the teams that want them, so the level of play will keep dropping while prices keep going up if nothing is done about this.