Every Polish or Western company hiring foreigners on high-paid jobs instead of Poles should be burned to the ground. Social frustration in Poland caused by low salaries is so hardcore already that it is only a matter of time when physical violence against immigrants will become more visible.
I know plenty of Poles making good careers in London, Paris, Frankfurt as accountants, bankers, IT specialists, in medicine and the arts.
They were supposed to make these careers here, not abroad