That's nothing. Check out what the U.S. has done for centuries to misinform us all about the treaties it signed with indigenous tribes, technically binding under the Constitutional
You realise that institutions like the IMF and World Bank do exactly that? What exactly do you think happens to third world countries that can’t pay back IMF and World Bank loans? They get to walk off scott free? Here’s a hint: neoliberalisation gets introduced into the country and its assets get taken and privatized by western corporations.