Did US have economic shocks? Compared to, say, Eastern Europe or Sub-Saharan Africa, all people who lived through real economic shocks and hyper-inflation tend to save less , not more. Because they know the savings can evaporate one day.
They absolutely save. Just not in their own currency - they'll instead rush to cash out for gold, USD, prime real estate (if they're rich), or some other less volatile store of value, before their currency gets devalued even further.
Been there, done that.