Did you know Greece and the US are in roughly the same financial condition? I didn't either but last night's Daily Show taught me that since Greece's debt per capita is roughly the same as the United States' ($44,000 and $45,000, respectively), we're in the same boat. Yes, yes, it's a comedy show and this interpretation leads to funny conclusions. But it's still a sloppy interpretation; population doesn't matter. Wealth does. A single person can take on the whole of Greece's debt and still be solvent if the are wealthy enough.
So let's instead look at public debt as a percent of GDP. The US's public debt is 92.7% (yes this includes states' debt). Greece's is 130.2%. The US's debt is less than its GDP; Greece's debt is 30% more than its GDP. In other words, entirely different.
So perhaps it's not surprising that Daily Show viewers are sometimes very poorly informed about world events.