One of the things that has struck me, when I have gone on luxury cruise ships, is that most of the passengers look like they are older than the captain -- and luxury cruise ships don't have juveniles as captains.
The reason for the elderly clientele is fairly simple: Most people don't reach the point when they can afford to travel on luxury cruise ships until they have worked their way up the income ladder over a long period of years.
The relationship between age and income is not hard to understand. It usually takes years to acquire the skills and experience that high-paying jobs require, or to build up a clientele for those in business or the professions.
But those in the media and in politics who are currently up in arms, denouncing income inequalities, seldom mention age as a factor in those inequalities.
The shrill rhetoric about differences in income proceeds as if they are talking about income inequalities between different classes of people. It would be hard to get the public all worked up over the fact that young people just starting out in their careers are not making nearly as much money as their parents or grandparents make.
Differences in wealth between the young and the old are even greater than differences in income. Households headed by someone 65 years old and older have more than 15 times as much wealth as households headed by someone under 35 years of age.
But these are not different classes of people, as so often insinuated in runaway political rhetoric. Everybody who is 65 years old was once under 35 years of age. And most people under 35 years of age will someday be 65 years old.
Differences in age are just one of the reasons why the insinuations about income and wealth that are thrown around in the media and in politics are often remote from reality.
While the rhetoric is about people, the statistics are almost invariably about abstract income brackets.
It is easier and cheaper to collect statistics about income brackets than it is to follow actual flesh and blood people as they move massively from one income bracket to another over the years.
More important, statistical studies that follow particular individuals over the years often reach diametrically opposite conclusions from the conclusions reached by statistical studies that follow income brackets over the years.
Currently we are hearing a lot in the media and in politics about the "top one percent" of income earners who are supposedly getting an ever-increasing share of the nation's income.