Just wanted to comment on a fine point about this. If the spouse who would be collecting the spousal benefit was born before January 1, 1954, this option is still available.
Also wanted to comment on another poster's information that if you earn more than a certain amount of money, the social security benefits that you'd be collecting would be reduced. This is true only if you start collecting before your full retirement age, and even then this sort of reduction would apply only to the years between then and your full retirement age (FRA). If you start collecting at or after your FRA, your earnings do not affect your social security benefit amount.
Not only that, but--now stay with me here, since it's kinda complicated--if you were to start collecting your social security at or after your FRA and the income that you were currently earning surpassed your earnings for any one of your 35 best-earning years (which form the basis of your social security benefit), then the amount of your social security payment would continue to rise, as you would be "replacing" lower-earning years even though you were collecting your benefits already.
This is all described on the government social security site. You don't have to take my word for it! I just know this stuff because I did a lot of studying over the last year or so. It is complex and everyone's situation and needs and desires are different.
Just a small warning about consulting a financial advisor: a lot of financial advisors make their living selling all kinds of financial instruments. Be careful and make informed decisions.