I'm not following you here.
The genders don't matter, but to make it easier to talk about say there are two couples, all four individuals turning age 66 this year, and in each couple the husband has earned the social security wage maximum for 35 years (in 2015 that's $118,500). So the husband can claim $2,663/month now, or he can wait to age 70 and get $3,501/month starting then.
Meanwhile if in one couple the wife never worked (and never paid any social security taxes) she can still get the corresponding half of his benefit i.e. $2,663 = $1,331/month starting now or half of $3,501 = $1,749/month starting at age 70.
If in the second couple the wife earned say one-third of the social security wage maximum for 35 years her own benefit is roughly the same $1,331/$1,749 per month. (The social security benefit calculation uses a skewed rate so that one-third of maximum income gets you ~50% of the maximum benefit.)
That's my reason for saying that the wife in the second couple paid all her social security taxes for nothing. Had the wife in the second couple only earned 20% of the full wage for 35 years, or earned one-third of the full wage for 17 years, her benefit would be less than $1,331/$1,749 on her own record, but the social security administration would still top her up to 50% of her husband's benefit, resulting in her getting the same $1,331/$1,749 as the non-working wife.