A large part of it is originally rooted in racism if you look how the US implemented its welfare state. Many benefits were skewed towards white americans (GI Bill, right to claim land, redlining and social security). I'm sure most Americans aren't nearly as racist right now as back then but the being 'on their own' is linked to the 'don't want 'lazy' african americans to get benefits'.

How were Social Security and the GI Bill skewed towards white Americans, exactly? I haven't heard that before.