What most people (and this article) tend to ignore is that a 65 year old should be richer than a 25 year old. 40 years of good savings discipline will lead to a nice number. Maybe not a million, but a large sum regardless.
Instead, this article wants to focus on the ultra-high net worth (although the article uses a $30 million cutoff instead of the usual $40 million). In the end, you have an article that is more likely to divde people than get people to say say, "wow, those older folks sure did a good job savings - I should do that so I can be like them." Instead we get the opposite.