I understood that as a style figure meaning 'the US government is using borrowed money, like a credit card'. I think it's quite disingenuous. (maybe I'm wrong

I understood that as a style figure meaning 'the US government is using borrowed money, like a credit card'. I think it's quite disingenuous. (maybe I'm wrong - I'd do a first-order validation of the idea by dividing 15 trillion by the amount of us citizens, but I don't quite know now many zeroes there are in 15 trillion and if it's effected by false friends like 'billion' (meaning: 'billion' in English has a different amount of zeroes as the homophones in other languages)).