USA can't default because they have the money printing machine. Why going bankrupt, when you could print more money and pay your debts?
They cannot just print money to repay debt, if that was the case they will not need debt to service their expenses at all, just print more money for spending. I understand that indiscriminate money printing has increased over the years but there are still some processes which has to be followed.
They are still printing money to pay their own debt, but they do it all in a process that is not too revealing. Because if they do it openly, they will face opposition from other countries and lead to a rapid collapse of power.
Printing money, creating war, creating world instability and then silently exporting inflation to the world to maintain its hegemonic position, and that is the process of the United States.
Many countries have realized that but no one dares to stand up and fight back, but finally we have someone brave enough to stand up and BRICS is the result, the answer to the US's unruly empire.