What jobs do immigrants work in Europe? In the US, we have a largely agricultural economy. Migrant workers pick fruit and vegetables, and work in slaughterhouses. These jobs are difficult to fill, and if they paid a wage that would be enough to make an American take that job, then labor costs would skyrocket.
Its hard to answer to your question for two reasons, you talk about "immigrants" as if they are an homogeneous group.
First we have to differentiate between intraeuropean immigration (polish moving to uk for example) where what you say may apply, basically doing cheap job at a cheap pay which is however more than they could get in their country from immigration outside Europe.
Secondly we have to differentiate between first generation immigrants, their sons and their grandsons; in this case it works the opposite of the US where you got first generation immigrants to be hard to integrate than slowly and slowly they became americans (think of italians there).
In Europe we got turkish or northern africans back then trying to fit while now their grandsons are those who basically turned london (togheter with new wave africans/middle easterns/southeast asian) into a battle field of stabbing and acid attacks, from 2013 till last year we got hundres of thousands of illegal coming from the mediterranean and the eastern route from the balcans too.
There are areas in sweden with sharia law and the police basically not allowed to get inside, I guess these are joy of multiculturalism leftists love so much.
Btw keep in mind youth unemployment is high in many european countries right now.
So why is it a problem if the labor costs went up? Those jobs used to be done by college kids in the summer....if the wages were high enough they would come back agaim.
Good point, clearly no coincidence that youth unemployment is very high in the 16-25 age group for less educated locals.
Even poor teens looking for support to pay their studies basically have no convenience at those salaries.