I agree with you. A lot of them are just taking up space, I want to apply to be an admin or moderator but there aren't any positions available. I feel that if you're not going to do your job, then step down and let someone who actually has time to do it take your place. I know ppl have busy lives and all, but that's where ppl who are more active and willing come in. I support this purge 1000%.
It should also be noted that these admins are not "taking" any slots away from potential new admins. We would encourage the admins of this wiki to update rights of past and present admins, so that users can better identify active users and find better channels of communication.