There's definitely inefficiency but I was replying to the notion that this would be a cure for blue-collar unemployment. It's not even going to make a dent.

The article itself shows a lot of screenshots which are specifically service jobs, also referred to as "pink-collar". Those are indeed rapidly on the rise and generally underrepresented in LinkedIn (https://poachedjobs.com is the go-to for food & drink) so I think it could be successful there.

But to suggest Facebook Jobs will be the panacea for blue-collar unemployment is sheer ignorance.