I realize the study was unable to or just did not perform “follow-ups” with the individuals they are positing “no longer work”. But, what exactly are these malcontents doing instead, then?

Living with parents? (Why would a parent enable this juvenile behavior)?

Relying on their spouse's income to survive (and, if so, is there any real harm/issue with this)?

Going “off the books” and just being part of the underground economy (in which case, this 'not working' posit is partly a falsehood).

Even woefully entitled dudes have to eat, no?