Earlier quoted context omitted.
Wealth inequality is higher in the richer EU countries than it is in the US, so is upwards mobility. You Wikipedia link does not disprove that.
Sources? The data I've seen says the exact opposite. Edit: Also my link has the Gini inequality index as the last column, where the US is literally sandwiched between Congo and Algeria, towards the bottom...
Also, in the GINI table on the wiki page, Netherlands and Sweden have more wealth inequality than the US.
Also, I find the GINI formula quite flawed as it puts India as being more equal than many EU states which I find hard to believe.
To me wealth inequality is how much of the country's wealth the top % own versus the bottom %, and at least in Germany and Austria it's pretty bad.