You have to be a little careful with the social mobility stats. Countries with a very equal society score very high on these scales - because they really map "

You have to be a little careful with the social mobility stats. Countries with a very equal society score very high on these scales - because they really map "am I rich and were my parents were rich". Countries where everyone is happily in the middle (eg scandanvia) show low correlation with your parents income and that counts as high social mobility - when in fact it's just low mobility for everyone. Countries with a high immigrant population in the preceding generation score very high - just because the first wave of immigrants probably did relatively badly compared to the average population, so if their kids do average that looks like high mobility