This is an aspect I’m genuinely curious about (as someone who is relatively uneducated on this subject) because my answer would be that yes, there will definitely be people who want to regress. There have always been individuals who are willing to sacrifice absolutely anything to obtain more material wealth or power. They’re a minority, but their existence has to be assumed and accounted for. For all of capitalism’s failings, one of its strengths is that it does give these people a path to follow that produces (some) benefit to society. How does a fully-implemented communist society deal with these individuals without them subverting and corrupting the system?

That’s not how human nature works. You really think you can sit there and tell me that someone who did 10 years of school and has the knowledge to operate and save people should be getting the same as someone who’s job is to cook you fast food? You live in a fantasy land where the Star Trek replicators exists. No one is going to do more work for the same amount as someone who does less. Society doesn’t work this way.