Yes. So too is a can of coke, a pack of ciggies, a pint of beer, a loaf of bread, a month's rent.The minimum wage here is a lot higher than the minimum wage in Poland.
I've worked with plenty of Poles. Literally none of them went home for winter.
Let me know when this actually happens, rather than it being something you imagine happening.And the people whose strawberry farms go bust can get jobs cleaning toilets in London. Bravo.