In the 40s 50s and 60s and partly into the ’70s, nobody needed credit cards, they paid cash mostly. Me produced all our own needs. There was a shortage of labor. Lots of required over time pay. People were well off. No medical insurance was needed.
BECAUSE we had WAGE inflation, then after that they started using foreign labor and more borrowing and spending from there future INCOME. The only hope for massive inflation would be nobody accepting dollars for payment.
There is no way to get too much money chasing too few goods. Mass production by robots that can work in the dark and cold.