You really think the Lakers would sacrifice so much money just to stop the Kings from moving?
Besides, from what I understand, and I could be wrong, the Lakers and Clippers have the power to refuse having a third team in their market, so they don't really need to sacrifice their new TV deal to stop the Kings, if they wanted to. The problem is that owners will not stand in the way of other owners' wishes in these matters, in case they need their support in the future.