My column on Social Security got a big response from readers.

One of the points made is the big reward retirees can get by postponing benefits until 70, if possible. Waiting an extra four years from full retirement age, now 66 for many, to 70 would generated an 8 percent annual benefit: or 32 percent higher than taking it at 66.

Some disagreed saying people die early and should take it early:

But according to life expectancy tables, thank you About.com, there’s a good chance of living beyond 79 and a half.

Steven of Owings Mills wrote:

“You mentioned nothing about the money a person "would not receive" by waiting to begin their benefits at age 66 versus age 62 or at age 70 versus 66.  I've been doing the math for the past 5 1/2 years and it goes like this; assume (and I hate using that word), for a moment, that one's benefit at age 62 was \$1500 and at age 66 would be \$1950 (by the way, the math is the same for waiting to begin benefits at age 70 instead of at 66).  In this example, by waiting four years to begin receiving benefits, the money "not received" would \$72,000 (48 X \$1500).  Dividing the \$72,000 by \$450 (the difference between benefits by waiting till age 66) equals / results in the number 160.  That's the number of months a person (who waited till age 66 to begin benefits) will have to live beyond age 66 JUST TO BREAK EVEN by not beginning benefits at age 62.  That's 13 1/3 years.  What a gamble!!”

The longer you live, the greater the likelihood you will live longer. Thanks to life expectancy information on About.com, the life expectancy of someone who made it to 65 is  83.4 years.  If a woman makes it to age 75, she is expected to live until 87.6.  A 75-year-old man is expected to make it to 85.5.