IIRC, Jason will be 26 when next season starts. JB will be 27. KP will be 28 and White will be 28 as well. ONLY Jrue and Al will be in their 30's AND I think PP ,and Hauser are also under contact.
BTW I think Hauser has been the most improved bench player. His DEFENSE this playoff run has been eye opening. Just check his stats when he was the main guy covering Kyrie or Luka . He only had 2 of 6 tonight, but 3 of those misses were in and outers.
Bench players who get 15-30 are important in getting your team through the 82 game grind that is an NBA season . The minutes they play from November to may allows you to get your starters get to the playoffs rested and ready to play in that hard grind when starter minutes always go up