Yes, this is how European social welfare works. And it is fantastic! Because the entirety of the EU is benefitting from it. Polish people have larger spending power, interesting and safe places to visit, etc.
This is not a "present" given to Poland. This is ensuring a better life for all Europeans.
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So you’re taking from others who earned it and give it someone that didn’t? Got it.
In the 1980s, EU money was flowing to Spain, Portugal and Greece. And people complained about that too.
But the result is inarguably positive. Those countries had only recently become democracies after decades of military dictatorships or otherwise unstable third-world style governments. Today they're the most dynamic economies in the EU in many respects, and their democracies are well established and functioning.
The EU doesn't get nearly enough credit for how it transformed the continent. People have forgotten how nearly all European countries were in a very bad shape after WWII. Fascists had remained in power in Spain and Portugal. Soviets were orchestrating communist takeovers in countries like Italy. It's a small miracle that the liberal democratic economic order won so quickly and decisively.