Social Security serves as a financial lifeline for millions of retired seniors. And while it's generally best not to retire on Social Security alone, if you were a higher earner, your monthly retirement benefit might be quite substantial. But if you were a lower earner throughout your career, your monthly Social Security benefit may not end up being much to write home about.

In some cases, though, you can snag more money from Social Security even if your lifetime wages aren't substantial. That's because you may be able to use a spousal benefit to bump your payments up.

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Source Fool.com