Reading that transcript was a chore so I went to their respective websites:

https://www.hillaryclinton.com/issues/social-security-and-medicare/

https://berniesanders.com/issues/strengthen-and-expand-social-security/


I think Sanders' platform is more comprehensive with fewer examples of empty rhetoric like "FIGHT to expand social security", "ask the wealthy to contribute MORE" that Clinton uses on her website. Bernie is breaking it down into more concrete terms like:

"Sen. Sanders has introduced legislation to end this absurdity, by lifting this cap so that everyone who makes over $250,000 a year pays the same percentage of their income into Social Security as the middle class and working families.

This would not only extend the solvency of Social Security for the next 50 years, but also bring in enough revenue to expand benefits by an average of $65 a month; increase cost-of-living-adjustments; and lift more seniors out of poverty by increasing the minimum benefits paid to low-income seniors."


He even ads a nifty little video:
https://youtu.be/FAcv7g3O_iM

I didn't watch the debate but from what I've seen of it this morning I still lean on Bernie's side.