How to achieve parity in the NBA?

The salary cap is designed in part to create league parity, but now that many of the best players have acquired sufficient wealth that additional dollars hardly matter, the stars are clumping together in quests for the ring.  Assuming the league desires parity, what rules will help?  Might players be forced to accept the highest paying contract regardless of location?  For example, a player submits a desire for X years and team offer $Y in a standardized contract.  The highest bidding team gets the player.  The best players who are beyond financial worries will resist because the loose autonomy as will the role players willing to sacrifice income for a ring.  The team without winning legacies (to the extent legacies attract players) will be in favor.  Thoughts?