^Personally, I think that's exactly what's going to happen next mission. I have a feeling that many weaker members of the Tokyo Team are going to die and then get brought back immediately because of the others that scored a 100 points. Maybe then Sakurai will finally bring up Sakata's point again, that it's cheap to bring people back to life, and the team starts to hesitate.
Then, once Katastrophe starts, nearly everyone is killed off again, thus reinforcing Sakata's opinion, and the Tokyo Team ceize to revive people. Perhaps if Katastrophe starts, Gantz will give more options aswell and the survivors decide to use their points for different stuff.