I suspect that many Americans would struggle to afford to pay for a phone outright. The vast majority live paycheck to paycheck and are already in record amounts of household debt.
https://www.cnbc.com/2024/11/19/bank-of-america-nearly-half-...
https://finance.yahoo.com/news/52-americans-live-paycheck-pa...
https://www.consumeraffairs.com/news/goldman-sachs-study-fin...
https://econofact.org/factbrief/is-there-a-consensus-that-a-...
No matter if it's "Nearly half" or 60%, things are clearly far from good for most Americans.
If the point is just that the hedonic treadmill means Americans will continue to be less and less happy as we get more and more wealthy, well, that's the problem we need to fix.
Because the difference between those is a vast gulf.