Comparing debt to GDP is mainstream economics, but it's very much different from the analogy of homeowners debts and their salaries. The proper analogy there would be government revenues, not GDP.
This is pretty non-mainstream macroeconomic point of view. It did not correspond to reality when latest sovereign debt default occurred in Greece.
Then it was government, foreign banks who bought the debt and European Central Bank who was on the hook for restructuring, not citizens or general public.
https://en.wikipedia.org/wiki/Debt-to-GDP_ratio
> is usually unable take their income streams
It takes a percentage of that, through taxes.
https://en.wikipedia.org/wiki/List_of_sovereign_states_by_ta...