Possibly. Shows don't necessarily get multiple seasons, and even if they do writers aren't necessarily brought back for their duration. For example of the 11 pe

Possibly. Shows don't necessarily get multiple seasons, and even if they do writers aren't necessarily brought back for their duration. For example of the 11 people with writing credits for Stranger Things (including both Duffer Brothers), 6 have only written for a single season. Now if you are the showrunner for a successful series you're going to be making bank for a while, but the overwhelming number of writers will never be in that position.