Presuming social security does not largely die. Trust in the Lord (for salvation on His merit, and to provide sustenance for this life as per Mt. 6:33).
There are also numerous passages that suggest that we prepare prudently. Primarily spiritually, but it also applies to practical measures (The ten wise bridesmaids anticipating the groom and had more lamp oil, the king anticipating an attack of 20,000 men).
Of course, I have no way of knowing if Social Security will be intact then. No point in worrying over things which I have no control over.
In any event, I would not partake of the benefits of marriage with actually getting married (nor would my wife), so I am glad that as things now stand that she would be provided for by my Social Security in part as we have not been able to save a lot.