When the economy does a down-turn, older workers are the first to be released at many companies. The reason — their salaries are higher, so the companies save more by getting rid of them.
Older workers tend to be the lesser desirables when companies are hiring. Companies like younger workers because they can usually get them at lower salaries.
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For many recently unemployed older workers, SS may be one of the few viable options, after their unemployment benefits run out.
Another group to look at are those folks who retired early thinking they had plenty of money. Now they don’t and they are claiming SS as soon as they can instead of going back to work.
The real explanation, in a nutshell.