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Anyway, the article's author seems to be quite the hard-line capitalist:
> "The only plausible way to keep public pensions solvent... is for retirement ages to rise as life expectancy does."
So, even though society's productive capacity is incredibly high, having risen and risen over two centuries of industrialization and mechanization - supposedly the problem is that older people are slacking off. This is (mostly) false. Most of the basic material wants we face today are artificial. That is, people don't starve because there's not enough food, they aren't homeless because there are not enough houses and apartments, they are not left untreated for medical conditions for lack of doctors and nurses etc. That's not to say that there are never shortages of materials or of trained professionals; but what the author is essentially saying is that working people need to shed blood, sweat, and tears more so that the insufficient share of the fruit of their labor, that actually goes back to them (= us), becomes sufficient.
This is not dissimilar from a feudal lord, who takes most produce as tax, telling his tenant farmer that if he wants to have enough to feed his children, he should get some of them to also work the fields so that there's enough to go around.