Inequality in the US and UK

The first video is about inequality in the US and the second about inequality in the UK. It’s been argued ( the picture given is inaccurate because wealth is correlated with age and the poorest 20% are going to be the youngest who simply haven’t had time to accumulate wealth. I don’t know how the stats and charts were constructed and if they took the age factor into account in any way but the inequality represented by the statistic that the top 1% have as much wealth as 60% of the population is not going to be negated in any way by a reference to age differentials.