Richer countries wouldn't exist without a population of illegal migrant workers for them to exploit. Europeans like to ignore it because they in general have great regulations for their working class but they regularly gloss over the rights of migrants who prop up their way of life.
Then next election cycle they become a scapegoat for all their problems
This is starkly visible here in Finland. Outside of the old Eastern Bloc countries we're the most racist country in the EU (see eg. the EU Agency for Fundamental Rights study called Being Black in the EU from 2018), and it's often incredibly difficult for someone with even a foreign name to actually get employed here as anything but eg. a janitor, waiter, Wolt/Foodora delivery driver etc., completely regardless of how educated someone is. Westerners might have an easier time although that's not guaranteed at all, but especially Black, and Middle-Eastern folks struggle to find any sort of employment that's not menial and criminally underpaid (sometimes literally.) Immigrants form a huge underclass here and everybody seems to do their damndest to pretend that this isn't happening
