Social Security

Watching clips of Musk on Rogan on the very obvious considerations for social security in the future. Since the conversation was at a sub-average IQ level all around, follow-up questions were limited. So a question to the people of Reddit:

What would it take, on balance, between income limit increases and/or age limit for payments to drive solvency?

Could a graduated solution where years to 65 are added on as incremental months to receive benefits work as a standalone solution (60 YO today = receipt of benefits at 65 + 5 months)?

Bonus points for responders providing the maths behind.