You don't seem to understand that it's not that simple. If the trail of dependencies in the system is deep and highly leveraged, it doesn't matter if the government "wills" it to be one way or the other.
Economies and companies are highly interconnected. There is no magic wand to fix the problem without serious repercussions, even with an authoritarian government.
You wipe out USD debt holders, they will never lend to your companies again. You print money to pay off debts, you get inflation, weaker currency and potentially other destabilizing outcomes, like moral hazard of private sector expecting bailouts.
All debt problems can be solved via arbitrarily high inflation, yes. But it's also the setup for mass suffering and potentially revolution.