There are numerous measures of inequality in income and wealth, like the Gini coefficient for instance. But I'm wondering about a different measure: the amount of labor, measured in man-hours, that is employed in the production of the goods and services that a given person consumes. Inequality of man-hours employed was clearly quite high in the United States in the early twentieth century, since rich people back then had servants, cooks, drivers, and the like, and they owned a lot of labor-intensive luxury goods. So I'm wondering what that measure of inequality looks like in the US today and in the recent past, and how it compares with the rest of the world.
Note that this isn't some metric I'm making up out of whole cloth; I think back in 2007 or so the New York Times ran a series of articles on class differences in modern America, and they said that one of the best indicators of someone's economic class is whether they have goods and services that took a lot of labor to make, or whether their daily life doesn't command a lot of human resources. And I think they said that judged in this way, class is more prevalent in American society than it might otherwise seem. So I'm pretty sure there's plenty out of data out there on this measure.