Yes and what happened every time in between? Significant civil unrest or wars. The first and second world wars actually acted as great equalizers (as did the civil war, the French revolution etc.) everytime after a new "aristocracy" develops and tries to keep keep the wealth to themselves. So I guess we need another upheaval, is that the argument?
200 years ago> There's a very specific reason for that: the cotton revolution and the monopolies created by it.
150 years ago> There's a very specific reason for that: the industrial revolution and the monopolies created by it.
100 years ago> There's a very specific reason for that: the oil revolution and the monopolies created by it.
Etc.