It wouldn’t _have_ to, that’s a political decision not a mathematical requirement.

But, even if you did it would still help tremendously and possibly still be sufficient. There’s diminishing returns where lower income people get a higher percentage of their income as a social security benefit. As long as that policy is maintained the ultra high wage earners would be contributing far in excess of the benefit they get paid back out

In that case it’s no longer about social security it’s just a 12.4% marginal tax increase (employer + employee).