Unfortunately last several millions came for exactly the opposite. Free full government support, aka communism.
Denmark’s Turn to Temporary Protection Has Made It a Pioneer in Restrictive Immigration Policies
https://www.migrationpolicy.org/article/denmark-migration-pr...
America is similar. Ignore the homeless, the people who can't afford basic trips to the doctor, the illegal immigrant underclass, hope the crime problem never affects you, and focus on your own money, and it's fine.
I'm guessing you are not (and will never become) a citizen to your birth country. And your parents left because it was not a great place to raise you, you are probably in a better country now.
What's nice about that, getting into debt as soon as one of us gets medical emergency? Or staying in a suburban home 24/7 with a child until they can go to school?
If you divide the GDP by the number of employed people (including self-employed and entrepreneurs), you get a bit over $180k/person. The median full-time income is a bit over $60k. In other words, as a gross simplification, the mean worker earns 80% more than the median worker.
The comparable numbers for Germany are a ~€100k, ~€45k, and 35%. If something is hollowing out the American middle class, it might be the high earners rather than the capital.