Nice to read articles from the past as it helps you see that there are always similarities from then to now. The story writer is partly deficient in comparing how one lives today relative to how one's parents live today (it's why most millenials want most of the fancyments that their boomer parents raised them with but haven't yet worked/saved long enough to pay for it)
The writer may be a little complainypants but there are truths to a lot of what she wrote - there were significant economic, cultural and productivity changes during the boomers lives (and continues to be) and some of them are referenced. A lot of it has to do with things that impact inflation (economic, lifestyle) including two people working in a household (it wasn't out of need, it was out want), a signifcant leveraging cycle (debt became ever more common and exponentially growing) further impacted by declining interest rate supercycle (still hasn't ended), migrating to the burbs thus requiring cars, technological toys that needed to be had.
As these things grew, companies did shift more of the cost of health care/retirement onto the employee and/or governent without an offsetting increase in compensation. These things have led to the inequality gap as access to capital combined with cheap leverage and productivity gains ultimately flows to those who have the assets.
That is still continuing. Sure there are a bunch of whiners in the millenial population (or others) but the reality is that whole generation can't just say that "You know, I am going to stop complaining and take action and all will be better"
Don't get me wrong, that is exactly what EVERYONE should do, but the reality is that most won't be successful as a result and therefore a whole generation by definition won't be as successful.
As individuals, none of it matters - work hard, grow income, save hard, and maintaint a 1950's-ish lifestyle (limited emphasis on cars, toys, spending, etc.). Sounds good to me, but I couldn't tell you how to reverse course from a societal perspective.