Yes, and to add to that point, SheitlQueen, imagine that you live a lot longer than expected. Say you live to be 100 years old. How would you feel if, on reaching the age of 78, you received a letter from SS saying that your payments would cease because, at this point, you had already received everything you paid into the system? Doesn't seem so great now does it?
SS pays you for as long as you live, regardless of how long that is. Folk who die early don't collect that much, whereas those who live long lives collect a lot more. We all pay into it for the collective good. Instead of thinking of it in terms of "getting the most for your money", think of it as longevity insurance - like an annuity.