[vk23]

The point of distinction is that EU internal immigration and the refugee situation are entirely different things. Refugees leave there home countries because of war and terror. Members of the UN are obligated [1] to give shelter to those people. Inside the EU there is indeed some welfare migration. This is however not only driven by social systems but also by available jobs.

[1] https://www.unhcr.org/1951-refugee-convention.html