Wow, the "ideal" wealth distribution based on what people want is simply nuts. If top quintile owns 35% and bottom two own 25% (perhaps 15% and 10%, respectively)...that means the richest would own 3.5x more than the poorest, on average.
(If you think this makes any sense at all, consider the median American has a net worth of about $45K. Having 3.5x that amount wouldn't allow you to retire, or even own a 3BR house in Minneapolis.)
A person's wealth should (hopefully) increase as they grow older and save more money. It's clear that the responders to this survey didn't account for that at all.