The share of wealth is irrelevant because the pie grew. It would only matter if the pie stayed the same size. You were asking if millennials are doing worse than their parents, but worse is an individual thing, a per-capita thing. And they're simply not. They're doing just about as well as all the other past generations were at their age in constant dollar terms. The old adage goes "it takes money to make money" and their wealth will increase exponentially as they get older too. But they're not doing worse. Sorry. And they're going to inherit boomer wealth soon, collecting the share too.
[edit] (In fact the WaPo article you linked mentions the same exact thing I'm telling you, and makes a half-hearted attempt to compensate - failing to also account for the total amount of wealth on a per capita basis. This article is clickbait.
> One important caveat to the chart above is that the three generations aren’t the same size, population-wise. In 1990, for instance, boomers accounted for 31 percent of the total U.S. population. In 2008, GenXers were only 22 percent of the population.)
Some things are a lot more expensive, some things are a lot less expensive, but even ones you pick are misleading. For instance, housing. 1 square foot of house in America on average costs the same as it did in the 1970s adjusted for inflation. [1] However the average house is twice as big and the average family smaller. With drastically higher interest rates back then, and most people on a 30 year fixed, housing is much more affordable on a square foot basis. It could be better, and zoning rules are at issue.
But a lot of things are cheaper too. Basically anything that doesn't require human labor to assemble. TVs. Computers. Tons of stuff.
> This clearly sets the dynamics of which generation will be working for whom.
The only dynamic you're seeing is time value.
> And while there is a temporary reduction of life expectancy due to various factors, incuding covid, millenials will most likely see extension of their own life expectancy within their lifetimes due to medical advances.
That's (a) not the current trend, though it may reverse and (b) the opposite of the argument you were making about boomers earlier.
> And while there is a temporary reduction of life expectancy due to various factors, incuding covid...
Also, COVID killed boomers not millenials.
[1] https://fee.org/articles/new-homes-today-have-twice-the-squa...