If a baby would come out it, that is just as productive as a job (though more and more people do abortion nowdays).
I don't see why working/producing is anymore meaningful than partying / socializing. I think people can find meaning in their life in different ways.
This is the 20-something version of being idle. Minus the travel, which isn't a given.
Being 20 doesn't mean you want to do something productive or meaningful with your life. There's plenty 20 yo that party, socialise, get drunk and never amount to anything. The reason it's just a phase is that it's not all trust fund kids and most need money (a job) to live.