Earlier quoted context omitted.
Your data does not say what you are claiming it says. It is possible (or even probable) for the ultra-wealthy to have retirement accounts. Once we admit that, then the obvious question becomes: Who do you think owns most of the money in those retirement accounts, the rich or the poor?
Retirement accounts are limited by the amount one might deposit annually. The most perhaps one can make is 19k in 401k and perhaps somehow max out SEP IRA - $56k (which I find quite tough to max out). Regular IRAs are out of questions, since at the income level dealing with 401k and SEP IRA, one does not get any benefits of funding regular IRA afaik. So... The best-case scenario is $75k per year someone might be able…
Also, as my sister comment points out, rich people can still have ridiculous retirement accounts. Saying that “everyone gets a piece in retirement” ignores a large portion of our society.
[1]https://fred.stlouisfed.org/series/MEHOINUSA646N [2]https://fred.stlouisfed.org/series/A229RX0 [3]http://press.careerbuilder.com/2017-08-24-Living-Paycheck-to...