Basically because we can't get past the whole metaphor of having "a job," and things go badly.
It will be claimed that the guest workers are performing jobs the citizens in the richer countries simply refuse to do. This will be yet one more thing which makes it all the harder to get past the job thing.. . . all those "guest workers" from Eastern Europe? . . .
w/o the wwI/II losses, there is no need for guest workers.What would they do with all those "guest workers" from Eastern Europe?
A metaphor?Basically because we can't get past the whole metaphor of having "a job," and things go badly.