The problem with that narrative is that cash transactions or only around 20% or less of all transactions in dollar terms.
Consumer spending is about 70% of the domestic economy, and the low wages are getting lower, taking disposable income lower with it. They already have the public stump trained, and cash users already have their own niches, via money orders, etc. The middle class loves plastic, direct deposit, and all the frills; it makes them feel 'Speshul'. Never mind the extra 3%+ on prices they're paying for that 'Speshul Feeling'. And that is soon to go up, as banks and financial services are going to see yet another wave of mergers and concentration in the coming 'recession' and series of failures.
Credit card balances are around a trillion bux now.