The United States defaulted on some Treasury bills in April 1979 we paid a steep price for stiffing bondholders, because the interest rates doubled. They went from 8% to 16% & it took 8 long years before rates came back down to 8%. This would destroy the US economy if it happened today. Yet we now are intentionally going to default. Bondholders will certainly be more pissed about that than they were for the mistake in 1979.
Treasury blamed it on the failure of Congress to act in a timely fashion on the debt ceiling legislation in April 1979. The bond holders had to join a class action lawsuit & sue the Federal Government to get the rest of their money.