One of the US’s biggest assets is its trust-ability. People around the world clamor to do business in the US, and creating outsize demand for the US’s currency because of it.
Obviously, the people of the US can choose to reduce that perception, but there are tradeoffs. See Somalia and their currency’s purchasing power at the other other end of the spectrum.
Obviously the people wouldn't actually think that smashing parking meters to renege on a contract is a good idea, but, as we said, if they thought it was a good idea then it wouldn't matter if the contract states something about not smashing meters. There would be nothing to enforce the contract. It is not upheld by a supernatural force.
Obviously, the people of the US can choose to reduce that perception, but there are tradeoffs. See Somalia and their currency’s purchasing power at the other other end of the spectrum.