Generally the people trying to fake their identity or skills in interviews are doing so with remote jobs, with the goal of bumbling along indefinitely once they no longer need to be on camera.

The problem here is that companies have now gone from identity verification to this 'aptitude test' ML bullshit that's just another cover for increasingly weird arbitrary discrimination against applicants.

See this HN thread for all kinds of experiences with hiring fraud: https://news.ycombinator.com/item?id=32996457

It doesn't benefit genuine candidates to blatantly lie. They'll get caught later in the process. But you're assuming identity thieves are acting rationally or fear getting caught. They don't, and they're playing a numbers game. If you get past an interviewer and get fired after two weeks, your salary at a US tech company can be $5k, which is the average annual salary in many developing countries.