Putting his philosophical musings on the matter aside, when it came to the contract and the whereabouts of the three members in Meng Jiayi, Long Zhaozu and Liu jie, he could only assume;
A. They were alive and kicking and surrendered their roles to undertake new roles maybe supreme elders or guardian elders, as was the practice with most sects.
When it came to the high-ranking sects, those that were at rank three and above, while the position of sect master and elder was valuable, they almost always reshuffled the members in those roles.
Barring extenuating circumstances, they didn't have lifers in those roles. They usually held the post for a particular period of time and then surrendered that post to their new crop of cultivators, so they could focus on their cultivation.