It means that the economy is dividing into high-skill, high-wage jobs and low-skill, low-wage jobs -- and that the middle, the middle-skill jobs, and the middle-earning jobs, are starting to drop out of the economy.
To znači da se ekonomija dijeli na visokostručne poslove s visokom plaćom i nekvalificirane poslove s malom plaćom -- a da poslovi srednjeg ranga, poslovi s osrednjim zaradama počinju nestajati iz gospodarstva.