What does he say about the national debt including such issues as Social Security and national defense?

American government

https://youtu.be/So2OQW6gR6I

Discuss: Former Senator Simpson (R-WY) was the co-chair of President Obama’s bipartisan commission on the national debt. What does he say about the national debt including such issues as Social Security and national defense?

What must leaders in Congress do to reduce the burgeoning debt in the United States? According to the second video, who holds the majority of US debt?

Why might the US debt increase in the coming years? What concerns are there with the growing US debt?