> How exactly do you "end" the contract? Part of the deal with contracts is you don't just get to back out whenever you feel like it.
That’s not true if you’re a country. They can nationalize privately owned assets (https://en.wikipedia.org/wiki/Nationalization), default on loans (https://en.wikipedia.org/wiki/Sovereign_default), print money to devalue loans, etc. without repercussions other than loss of trust.