The answer to the question is "nothing"

Tyler asks, What happens in the Super Committee Fails?

I answer, Nothing of any significance.

Less than $1 trillion in actual cumulative total spending cuts ($167 billion is "interest savings") starting in Fiscal 2013 and going on for the next 8 years after that.

Pretty much nothing happens to entitlements. Defense is cut an average of $50 billion per year (from a base level of around $900 billion +).

Look, we are spending $3.6 trillion + every year! Knocking $95 billion/year off for 9 years is really less than chump change.

Of course the Super Committee will fail; failure is basically costless.