I did a google search on Greenspan, and found most of his "warning" comments were about social security rather the the debt. He made warning comments about the debt, but the ones I read were more along the line of "the economy can sustain itself while government balances its budget"" type comments.

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"Victory at all costs, victory in spite of all terror, victory however long and hard the road may be; for without victory, there is no survival."
Winston Churchill

He still disagrees with you. That's the important point.

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I wasn't born with enough middle fingers.