The document discusses how the U.S. national debt per citizen has increased from $20,000 in 2000 to $53,000 in 2013. To visualize this growth, it represents the debt as an increasing weight for Uncle Sam, such that the $20,000 debt in 2000 equated to 150 pounds, while the $53,000 debt in 2013 equates to 397 pounds. It concludes by suggesting Uncle Sam needs to go on a diet to reduce the national debt.