You own a company, you need to employ somebody for a job, you can either get a guy that not only is willing to work but also his dad, grandad and so on where all in same trade, or you got a guy that is also willing to work, but has never tried, heard off or knows anybody that does the job, who would you employ? No correct answer, only personal choice...
the personal choice with most companies these days would be poles or latvians (notice i didn't mention croatians they certainly didn't do their job the other night )