Seniors are on the job, even in their 90s

It used to be that the courtesy clerks at my local grocery store were all high school students. Now it's a mixture of students and seniors. The seniors seem happy to be there (certainly more happy than the sometimes surly students) but I sometimes wonder why they're there -- if it's because they like people, then I'm happy for them. But if it's because they don't have enough money to support themselves in retirement, I feel a little sad for them and hope they are at least enjoying their work.

Lately, lots of seniors are joining the workforce, both out of necessity and out of personal satisfaction. While I have broad dreams of spending my retirement sailing the world on a yacht, if that doesn't pan out, I can see myself working part time, whether I need to or not. Working is a great way to meet people, to keep occupied and truth be told, I like working -- it keeps me sane. The Huffington Post has a great piece on seniors in the workforce, including stories of people in their 90s who are still earning wages.

What do you think? Do you plan on working after 70?