what exactly is the endgame?
I imagine either: a) Get hired, collect a paycheck or two while doing the absolute bare minimum (filling out onboarding forms, etc - no real work) and then move on to the next victim company. or b) Get hired with the goal of getting access to improperly secured company or user data. I imagine a) is vastly more common than b).
It could also be to get the job. People often feel entitled but believe they are disadvantaged by some factor outside their control and use that to justify cheating, believing they will be able to do the job once they get there. Another version of this is people who apply for a job and actually are just posers who can't code at all. In both cases the employer failed to weed them out, even if the first version is a more overt kind of cheating, the outcome isn't much different than the second version