[throw0101a]

> To me it absolutely is, because you can only keep borrowing money and paying the (increasingly large) interest on it for so long.

Define "so long".

Not too long ago the UK refinanced debt from South Sea Sea Bubble (1700s), Napoleonic and Crimean Wars (1800s), and World War 1 (1910s):

* https://www.theguardian.com/business/blog/2014/oct/31/paying...

There were points in British history that debt hit >250% of GDP:

* https://en.wikipedia.org/wiki/United_Kingdom_national_debt#M...

And people lived through it all and the country is still around, and not a bad place to have lived, all things considered, during its history. Most of the times you may not have wanted to live there were unrelated to finances (e.g., Civil War, if you were Catholic during the 1500s).