Why should they worry about working? Hell, after being on a single episode, someone could do conventions and not worry about working "for real" ever again.The bigshots make big money to do conventions. Back when Shatner was signing autographs when he did conventions, he would get about $60,000 for a weekend engagement--which involved a total of about 6 hours work! That is if signing autographs and talking about Star Trek is work.