Eli5: How can some country have trillions of dollar in debt like Japan but still functional without any consequences?

Question

Eli5: How can some country have trillions of dollar in debt like Japan but still functional without any consequences?

In: 101

Answer 1

Well as long as the benefits of your investment exceed the interest rates everything is fine…

<insert here all analysis you want>

In the end money/dept is a Ponzi scheme and it will all come crashing down sooner or later