You didn't put choices, but I can help
A Possible reason that Countries can't pay there debt is a Depression
For Example, The Great Depression.
This was worldwide, and struck entire Economies. So, if you were a leader of a country or area with a depression, I don't think it would be the most exciting time.
Remember, to put a county in debt, you have to have some serious problems going on
Included, I hope you meant Debt
