<p>You still don’t know if this is the same group of families stuck in the middle levels. Maybe half of them moved up to the rich levels. The old rich die and drop off. I’d like to see a real cohort analysis–not just meaningless ranges that might be completely different people. Also my point about more consumption vs wealth building stands. All wealth is is deferred consumption with interest. If you are having it all now–as many people do–of course you are not building wealth too. I bet anything that your parents were more frugal day to day than your family is today and had more saved for their level of income.</p>