The US also had a fairly high debt to gdp ratio after the war as well and that us often regarded as the golden age of capitalism.
The fact is the country has been able to maintain debt its entire existence and "paying" back the debt is fucking dumb. You never do. You simple shrnk it relative to the size of the economy. It would.be impossible to pay back in real terms (you cant send goods and services back in time) and in nominal terms the debt is measured IN USD. The currency of which the US government is the sole monopoly issuer of. It must first ISSUE that currency before it can tax it, that means spending it and thats means debt first.
These facts never get mentioned in all the debt hysteria. Nobody mentions total us assets vs debt, nobody mentions output gap from the great recession (thats a real fucking outrage). All of these things are far better and more productive conversationns than look at how much money we "owe".