This day and age, "social mobility" is mostly a function of the dysfunction and inequality of the society in question.
The <Nationality>-American angle is horribly overplayed. With some highly insulated exceptions, very few people actually have anything more than a thin veneer of rituals - if that - linking them to the "old country". There are some genetic personality traits but even those are more often shared with other Americans than people from the "old country" (stubbornness, distrust of authority, tendency toward religion etc.).
Oversimplified, for purposes of inspecting e.g. "work ethic", a person is the product of the country in which they lived their formative years. A second-generation immigrant will get some heritance from their parents but at that point the effect starts wearing off.
As to your dissection of "social democracy"...well. Suffice to say Europe is, from experience with both, much more democratic than the U.S.
The <Nationality>-American angle is horribly overplayed. With some highly insulated exceptions, very few people actually have anything more than a thin veneer of rituals - if that - linking them to the "old country". There are some genetic personality traits but even those are more often shared with other Americans than people from the "old country" (stubbornness, distrust of authority, tendency toward religion etc.).
Oversimplified, for purposes of inspecting e.g. "work ethic", a person is the product of the country in which they lived their formative years. A second-generation immigrant will get some heritance from their parents but at that point the effect starts wearing off.
As to your dissection of "social democracy"...well. Suffice to say Europe is, from experience with both, much more democratic than the U.S.