This is probably one of the key points the article could be making, but it's kinda glossed over. As the baby boom generation (the one born ~1946 –> ~1959) nears retirement, it makes a lot of sense. That generation - my parents' generation - really did a large portion of the work involved with building out the physical infrastructure that allows our economy to operate as it does today: buildings, roads, power lines, mining, machinery, warehouses, etc. Physical work tends to create more injuries and disabilities than sedentary work, and people who do that kind of work simply cannot do it for as long as people who do sedentary work. How can we forget there was an entire generation of people who turned the 1940's USA into the one of the 1970s?
I know I've mentioned this on here before but it's relevant: my dad hung sheetrock for living. He stopped going to school after 6th grade. There was no way he could have made to age 64 -- people thought he was crazy to be doing it until age 53 -- which is when he died, almost 10 years ago. From a combination of issues related to what his work did to his body.
But the sheer idiocy of the system which has rewarded and continues to reward neat-suit Realtors and loan officers and salesmen (those "educated" ones who tend to work the sedentary jobs) -- instead of the workers meant that he was left with no options for healthcare, retirement, or even being able to leave his children a dime.
It's not like none of them have a work ethic. . . many of them have worked long and hard already; they're just "prematurely" tired and worn out. Not to mention the system keeps trying to move the dangling carrot of retirement further and further away from their grasp by attempting to increase retirement age.
[edit -- apologies for the awry double pasted text in the original post]