Interesting question I thought of reading about "safety net/services" comments from the people who worked in both the EU and the USA, i.e. those that have moved at least once.
Let's say you are from the EU.
Why wouldn't you work for a while in the US, accumulate wealth with low taxes and no social safety net (but good insurance, etc.), then when you don't want to work, move back to Europe and retire (or work much less) with the social safety net and your American wealth? ;)
Moreover, if you are not from the EU, but have an in-demand skillset, why wouldn't you make the money, and then get a gig in Europe for however long it takes to get PR (looks like it's only 4 years in Germany), to get the benefits? :)
Let's say you are from the EU. Why wouldn't you work for a while in the US, accumulate wealth with low taxes and no social safety net (but good insurance, etc.), then when you don't want to work, move back to Europe and retire (or work much less) with the social safety net and your American wealth? ;)
Moreover, if you are not from the EU, but have an in-demand skillset, why wouldn't you make the money, and then get a gig in Europe for however long it takes to get PR (looks like it's only 4 years in Germany), to get the benefits? :)