I tend to agree with this, but I've started to wonder if that's really true. Is there any way to actually test whether correlation != causation for the link between video games and unemployment? Like, an interventional study of some kind for example.

This is even more interesting in societies where there's little pressure to work, such as nordic welfare states. A lot of men I went to school with in Scandinavia decided they'd rather stay at home and play videogames than find a job.